parenthood.

If you have ever picked your toddler up from nursery only to be greeted with a streaming nose, a suspicious cough, or that telltale “they were a bit off today” look from staff, you are not imagining things. The first year of nursery can feel like one long revolving door of bugs, Calpol, and cancelled plans.

As exhausting as it is, there is now solid research explaining exactly why this happens and, surprisingly, why it might not be entirely bad news.

The reality: just how often toddlers get ill at nursery

According to a recent review led by researchers at University College London, toddlers starting nursery can experience around 12 to 15 infections in their first year alone. 

That number sounds dramatic until you break it down. We are talking about roughly monthly respiratory infections like coughs and colds, alongside a couple of tummy bugs and at least one rash related illness. 

In other words, if it feels like your child has been ill half the time since starting nursery, the evidence says you are probably right. One analysis even found that young children carry viruses about 50 percent of the time. 

It is not poor hygiene or bad luck, it’s simply part of the process.

Why nursery turns into a germ-sharing hotspot

Toddlers are, quite frankly, perfect little carriers of germs. They explore the world with their hands, their mouths, and very little regard for personal space.

But there is more going on beneath the surface.

First, their immune systems are still developing. Babies are born with some protection from their mothers, but that fades during the first year, leaving them more vulnerable just as many begin nursery. 

Second, everything is new to their bodies. Every cold, every virus, every minor infection is a first encounter. Their immune system has not built up a memory bank yet, so it reacts more strongly and more often.

Third, nursery environments naturally bring children into close contact with one another. Even with excellent hygiene practices, infections spread easily because children can pass on bugs before they even show symptoms. 

So it is not that nurseries are unclean. It is that they are social spaces filled with tiny humans who are still learning how bodies work.

The unexpected upside of all those illnesses

Here is the part that often surprises parents. All those illnesses may actually be doing something useful.

Researchers describe nursery as a kind of “immune system training ground”. 

Each infection helps a child’s immune system learn, adapt, and build resilience. Over time, this reduces how often they become ill.

In fact, children who attend nursery tend to have more infections between ages one and five, but fewer once they start school compared to children who stayed at home. 

It is essentially a trade off. More bugs now, fewer later.

That does not make the sleepless nights easier in the moment, but it does offer some perspective when you are wiping yet another nose.

Why it feels relentless for parents

Of course, the science does not capture the lived reality.

The late night temperature checks. The emails to work explaining yet another day off. The moment you realise you have caught the bug too.

The same research highlights that these frequent infections have a real knock on effect for working parents, from missed workdays to general exhaustion. 

There is also the emotional side. It can feel worrying to see your child unwell so often, especially in those early months when everything still feels new and uncertain.

What actually helps (and what does not)

While you cannot completely avoid nursery bugs, there are ways to make the experience a little more manageable.

Keeping vaccinations up to date is one of the most effective ways to protect against more serious illnesses, something researchers strongly emphasise. 

Following nursery guidance about keeping children at home when they are unwell can also help slow the spread, even if it does not eliminate it entirely.

And perhaps most importantly, adjusting expectations matters. Frequent illness in toddlers is not a sign that something is wrong. It is, quite simply, normal.

For a deeper look at the research behind this, you can read the full study summary from University College London News.

The reassuring truth parents need to hear

It does get better.

The same studies show that illness rates drop significantly with each year of exposure as children build stronger immune responses. 

So while it might feel like your toddler has been permanently attached to a tissue box since starting nursery, this phase is temporary.

One day, you will realise it has been weeks since the last cold. And you might even forget just how intense that first year felt.

Until then, stock up on snacks, keep a thermometer close, and remember that behind every sniffle is a tiny immune system quietly learning how to do its job.

If you are ever concerned about your child’s health take them to see a doctor, ring 111 or seek immediate medical advice.