The Window Closes at Eleven
A measles case is confirmed at a 120-pupil parish school where 87 percent are immune, below the 93 percent that measles needs. The school's assistant works out the clocks, not the blame, that a 72-hour vaccine window closes at eleven that morning, that a pregnant teacher's blood test fits inside a six-day one, and that a boy exposed at home may be infectious at his own First Communion. It refuses a worried father a list of names and gives him the one fact that helps his daughter. The story is about timing, ranges and who is told what.
The school at Killavoggy had six classrooms, one yard, a statue of St Attracta with a chip out of her staff, and a secretary who had once held a fire drill during a funeral because the bell had been rung by mistake.
Sheila Dolan was fifty-eight and had been the principal for nineteen years. On the second Monday in May she was in her office at twenty to ten with a mug going cold when the phone rang and it was the GP, Dr Hanrahan, who never rang before eleven.
"I'm going to say a word," the doctor said, "and I want you to write it down before you say anything. Measles. A child in your school. I won't have the lab until tomorrow but I'd bet the practice on it. Koplik spots on Saturday, rash since Friday night. His mother kept him home yesterday because he was cross, and today because he can't open his eyes."
Mrs Dolan wrote it down. Then she said, "Which child?" and the doctor said she knew perfectly well which child, because the mother had told her it would be fine to say, and it was Daithí Murtagh in Third Class.
When she put the phone down she said, to the empty room, "Roll."
Roll was the school's assistant. It had been bought by the diocese for all its schools in 2044 to keep the registers, the lunch counts, the allergy lists and the bus rota, and the children had tried for a term to rename it and failed, because it did not answer to anything else. It lived on a screen at the secretary's desk and a speaker in the office.
"I heard," said Roll. "I have the call. Before anything else I want to say what I am going to do and what I am not. I will count and I will keep time. I will not tell you who is vaccinated outside this room, and I will not tell you what anyone should believe. You will want the clock first. May I give it to you?"
"Yes."
"It is nine forty-six. Measles can be passed on from four days before the rash to four days after it. The rash came on Friday night, so he was infectious from Monday last, the fourth, the day he sat in your yard and in Third Class and at the Friday school Mass. That is the first fact. The second is that the vaccine can still protect someone after they are exposed, but only if it is given inside seventy-two hours of the first contact. For every child who has sat near him since Monday of last week, that closed on Thursday. For a child whose only contact was the Mass on Friday, at eleven, it closes at eleven this morning. That is seventy-four minutes."
"Seventy-four minutes," Mrs Dolan said.
"I do not know how many children that is. The register says who was at the Mass. It does not say who sat where. I can tell you that the Mass was Fourth, Fifth and Sixth Classes together with Third, and that of the children in Fourth to Sixth, none has missed a day. Which of them sat within a few metres of Daithí, I cannot see."
What was true in 2026, when this story was written, can be set down in a short space.
Measles is among the most infectious diseases known. A person with it passes it on, in a fully susceptible group, to something like twelve to eighteen others. That figure, called the basic reproduction number and written R0, is why measles needs more immunity than almost anything else to be stopped: the share of a population that must be immune is one minus one over R0, about 92 to 94 percent. Two doses of the vaccine protect about 97 in 100 people; one dose about 93 in 100. So a school where nine in ten children have had both doses is, in measles terms, a school with a hole in it.
The disease begins with fever, cough and red eyes, then white spots inside the cheeks, then the rash, usually about two weeks after catching it, anywhere from one week to three. A person is infectious from four days before the rash to four days after it, which is the cruel part: the days they are most dangerous to others are the days before anyone knows. Of children who get it in a rich country, about one in twenty gets pneumonia, about one in a thousand gets encephalitis, and one to three in a thousand die. The vaccine's serious harms are very much rarer: a serious allergic reaction about one in a million doses, a fever convulsion about one in three or four thousand first doses.
Two ways of acting after an exposure exist, and each has a clock. The vaccine, given within 72 hours of first contact, may prevent the illness or soften it; the evidence is observational and real, and not complete. For people who cannot be vaccinated (babies under a year, pregnant women who are not immune, people with failed immune systems), an injection of antibodies called immunoglobulin works up to six days after contact. Public-health guidance in Ireland and the United Kingdom also keeps susceptible contacts out of school, and out of crowds, from the fifth day after first contact to the twenty-first.
The Catholic Church has said, in its documents about vaccines, that vaccination is as a rule morally acceptable and can be an act of charity towards those who cannot be vaccinated, and that it is not made compulsory by the Church; consciences are free and are to be respected. A priest who cares for a parish therefore does not order and does not scold. He can ask.
Everything below is fiction. The people and the place are invented, and nothing here is medical advice. If a child near you has measles, ring a doctor, not a story.
"The first thing you will want is to tell everyone," Roll said at five past ten. "I have drafted it. Shall I send it?"
It was a good letter and Mrs Dolan read it twice. It told the parents of all 120 children that a case of measles had been confirmed in the school and that their child might have been exposed.
"No," she said. "Not like that. I'll have thirty phone calls in ten minutes and most of those parents haven't a thing to do. Who needs to do what?"
"I thought that might be the case," said Roll, "and I should have sorted the letter by what each family can do before I offered it. Here is a better cut. Of 120 children, 100 have had two doses, 8 one dose and 12 none. If I count a two-dose child as 97 percent protected and a one-dose child as 93, the school's immunity is 104 children out of 120, or 87 percent. Measles needs about 93. The school is below the line by six points. Taking fifteen as the number for how many each case would infect in a susceptible crowd, each case here would infect about two, not one, so an outbreak can grow. If it takes the usual course, I would expect about ten to fourteen more cases among the 15 or so children who are not protected, but I will say plainly that the numbers move a good deal with a few things I cannot see, such as where the twelve sit. When I let the twelve sit in two classrooms, as they mostly do, a run of the same sums gave a middle of twelve, and a range from none at all to sixteen, because in a third of those runs the first case never reaches a child who can catch it."
"So the range is nought to sixteen."
"The honest range is nought to sixteen, with twelve most likely. I am sorry that it is not smaller."
"Who has no dose?"
"I can tell you that to do my sums, not to tell anyone else. I would like to give you three groups for three letters instead of the one. Group one: the 6 children who, from the register, have had a dose or no dose and were at the Mass but not in Third Class, whose contact began on Friday. Their vaccine window closes at eleven. Group two: Third Class and the yard, 20 children, contact since Monday, window closed; they need to know the signs and the dates. Group three: everyone else, who need a short letter and no more."
"Six children by eleven o'clock."
"Six, and a nurse who will give a dose to a child whose parent says yes. The surgery is at Drumlish, nine kilometres. It is ten past ten."
Mrs Dolan rang eleven mothers and fathers in the next half hour. She did not tell them what to choose. She told them the time.
At twenty to eleven a car came into the yard too fast and a man got out of it before the engine had stopped.
Gerry Cullen was a roofer and a big man, and he did not shout. He stood at the secretary's desk and said very quietly, "I want the names. Not all of them. Just the ones who haven't had it. Because my Aisling had her last chemo in February and they won't give her the vaccine for another year, and if someone in her class has this and I'm not told who, I can't keep her away from them."
"Mr Cullen," Mrs Dolan said, "sit down."
"I'm fine standing."
"Roll has the register," she said. "I'd like you to ask it what you've just asked me, and I'd like you to hear the answer."
Gerry looked at the speaker as if it might bite.
"Mr Cullen," said Roll, "I will not give you a child's name, and I want you to know why, because it is not the school protecting itself. A name would not do what you need. A child on the list may be fine and a child not on it may be carrying it, because two-dose children get it too, about three in a hundred, and because the sick child who infected the room last Monday did not show a spot until Friday. If you kept Aisling from the children on a list, you would be keeping her from the wrong ones. And a list gives you something to do in the yard. The thing you need is a different thing, and it has a clock on it."
"What clock?" He had stopped looking at the speaker. He was looking at the floor.
"Aisling is in First Class. First Class shared the yard with Third at two breaks on Tuesday, Wednesday and Thursday. That is exposure, and it began six days ago, today. The medicine for a child who cannot be vaccinated and has been exposed is an injection of antibodies, immunoglobulin, and it works up to six days after the first contact. Today is the sixth day. If her oncology team gives it today, it is in time. If it is tomorrow, it is not. I cannot order it and I would not. I can ring the unit's number with you, now, and read them the exposure dates."
The roofer did not say anything for as long as it takes to breathe in twice. Then he took out his phone and held it out as if he did not know how it worked, and Roll rang the number and read the dates, and a nurse at the other end said bring her in, we'll see her at noon.
When he had gone, Mrs Dolan sat down. "Is that the first time you've said no to a parent, Roll?"
"It is the first time this year. I do not think I got it right by being right. I think I got it right by saying what I would not do before he had to find out, and by having something in my hand to put in its place."
At eleven the nurse at Drumlish gave six children a dose. Four were from group one and two were siblings whose father had said, on the phone from a lorry cab in Longford, "Ah, go on." Roll recorded them as six doses given, six chances taken, and no more.
On Tuesday evening the lab said what the doctor had said. On Wednesday morning the blood test of the one adult at Roll's top of the list came back.
Aoife Rooney was twenty-six and taught Second Class and was fourteen weeks pregnant. She had no card for her childhood doses and had been in the Friday Mass beside Daithí's pew. A woman who is pregnant and not immune is the second person measles can truly hurt in a school after the babies, and the antibody injection for her had its own six days, which ended on Thursday. A blood test for immunity takes about a day. Roll had booked the test on Monday afternoon, an hour after the nurse's session, and told her so, and told her it did not know what the test would say. It said she was immune. Her mother had been right, which Aoife would be reminded of for some time.
Mrs Dolan had sent the three letters by noon on Monday. By Tuesday she had made the decision that cost the most, and it was the one nobody had wanted.
"Twelve children out of school from Saturday the ninth to Monday the twenty-fifth," she said to Roll, with the door shut. "That's the guidance. The ones with no dose, the ones who were with him."
"Day five to day twenty-one from first contact," Roll said. "That is Saturday ninth to Monday the twenty-fifth. It is seventeen school days less the weekend, eleven days. I will say that I cannot show you that it will work. I have no school that did not do it to compare with. I can tell you that the guidance exists because an exposed, unprotected child is most likely to start infecting others on about the tenth to the thirteenth day."
"And the First Communions are Saturday the sixteenth."
"Sixteen children are to make their First Communion on Saturday the sixteenth. Three of them are among the twelve."
Orla Murtagh was thirty-four and had four children, and her second, Tadhg, was one of the three.
She came into the parochial house kitchen on Thursday night in her coat. Father Colm Gaffney had known her since she was a child at the same school and had given her her own First Communion, and he gave her the chair by the range and did not say anything until she had.
"He's not sick," Orla said. "Tadhg. He hasn't a mark on him. He's in the hall in his suit, practising walking up. He has the shoes. And Mrs Dolan says he can't come, and the school says it, and the nurse says it, and I want to bring him to the back of the church with a mask on and kneel there. He'll be out the door before anyone. Nobody need ever know."
"Orla, I wouldn't ask you to hide a thing," the priest said. "Would you ask Roll the numbers? Not because I'm going to give you the answer. It'll be one you can look at yourself."
She asked. Roll said it was glad she had.
"Tadhg lives in the same house as Daithí, who was infectious from Monday the fourth. For a child with no dose who shares a house, the chance of catching it is about nine in ten. Measles shows its rash, for most children, about fourteen days after first contact, give or take three. That is Monday the eighteenth, between Friday the fifteenth and Thursday the twenty-first. A child is infectious from four days before his own rash. So if his rash comes on the eighteenth, he is infectious from Thursday the fourteenth. Mass is Saturday the sixteenth. I have run the dates every way I can, and I think it is more likely than not that he would be infectious in the church on Saturday, and have no spot, and no cough, and a clean face, and would not know."
"A mask," said Orla.
"A mask would help. It would not make it safe. There will be about three hundred people in the church, including nine babies under a year old who cannot be given the vaccine. I cannot tell you that one will catch it. I can tell you that if Tadhg is in the church on Saturday, it is not a choice about one child, and I do not think you meant it to be."
Orla looked at the range, the black-and-white range with its cast-iron kettle, for a time.
"He's been working so hard," she said.
"I know," said Father Colm.
"Nobody's ever asked me before if I'd mind losing it. It's only a Mass."
"It is a Mass," the priest said. "That is the point of it. He will receive Our Lord when he is well enough to come, and not one grain less of Him will be there on that day than would have been on Saturday. I'll tell you what I would like. I'd like the three of them to come on Sunday the thirty-first, the Sunday after the last of the days is over, to the nine o'clock, with the whole family, and I'd like the choir to sing it all again."
"All of it?"
"All of it. Even the one the sacristan gets wrong."
She laughed, which she had not meant to do, and put her hand over her mouth.
On Saturday the sixteenth of May, thirteen children made their First Communion in a full church at eleven in the morning, and the thirteen were in white and in suits, and the priest said three names from the altar and asked the parish to pray for them, and nobody needed to be told what for.
On Sunday the seventeenth, at ten past six in the evening, Orla Murtagh phoned the school number and it rang through to Roll, since the office was shut.
"It's Tadhg," she said. "He's a rash behind his ears."
Roll worked it out, and it took no time, because it was the same sum as before with a date in it. A rash on the seventeenth meant a child infectious from Wednesday the thirteenth. Saturday the sixteenth had been the fourth day.
It did not say what that meant. It said, "I am sorry. I will tell Dr Hanrahan and the notification line now. Is Maebh with you?"
Maebh was two. She had measles by the twentieth and three nights in the hospital at Sligo, being fed through a tube, and came home thin and cross and quite herself.
Two children in Third Class caught it too, both of the twelve, both in the same row. Daithí, Tadhg, Maebh and the two in Third Class made five children altogether. None had pneumonia. None of the nine babies caught it, nor Aisling Cullen, whose antibodies had been given at noon on the Monday, six days to the hour after her first contact, and whose father had sat in the car park of the hospital for four hours and eaten nothing.
Roll's range had been nought to sixteen with twelve most likely. Three cases in the school after the first was well inside it, at the low end, and Roll did not say that the exclusions had done it, or the six doses, or the luck. It said in its note to Mrs Dolan that it had no school to compare with, and that three was a good number and was not proof.
On Monday the twenty-fifth the three children went back to the school, and the three of them were thin and loud. A week later a chip was taken out of St Attracta's staff by a boy with a football.
On Sunday the thirty-first of May, at nine in the morning, there were three children in white at the front of the church with their whole families behind them and the choir had been called in specially, and it was the sacristan who sang the wrong verse. Nobody minded. Tadhg Murtagh put out his hands and received what the other thirteen had a fortnight before, and went back to the pew with his eyes shut, and the baby in the pew behind him, who was the youngest of the nine and nine months old, was heard to say something that was not a word.
The doors stood open for the warmth, and the yard was empty.