5 COVID-19-related questions parents are asking
... a paediatrician respondsSunday, March 28, 2021
BY JAMES B WOOD
A big question among parents and teachers is when their children will be vaccinated against COVID-19. Some have wondered whether the vaccine is even necessary for children.
Dr James Wood, a paediatrician and assistant professor of paediatric infectious diseases, explains what doctors know today about the risk children face of getting and spreading the coronavirus and when vaccines might be available.
1. Do children really need to get the COVID-19 vaccine?
The short answer is yes. A lot of studies have shown that COVID-19 isn't as severe in children, particularly younger kids — but that doesn't mean kids aren't at risk of getting infected and potentially spreading the virus.
Children under 12 who get COVID-19 do tend to have mild illnesses or no symptoms, while teenagers seem to have responses somewhere between what adults and younger kids have experienced. The Centers for Disease Control and Prevention (CDC) found that teens were about twice as likely to be diagnosed with COVID-19 as children ages 5-11.
Researchers are still trying to understand why we're seeing these differences between older and younger kids. Behaviour probably plays a part. Teenagers are more likely to engage in social or group activities, and they may or may not be wearing masks. Immune differences and biologic factors may also play a role. Non-SARS-CoV-2 coronaviruses are common in children, often resulting in upper respiratory infection. Is their frequent exposure to other coronaviruses helping to protect them from severe COVID-19? That is one hypothesis. We know younger children's immune responses in general are different from adults, and likely play a role in protection.
It's important to remember that while most children get only mild symptoms, they still face risks. At least 226 US children with COVID-19 have died, and thousands have been hospitalised.
The key to minimising the risk is to make sure children eventually get vaccinated, follow social distancing recommendations and wear masks.
2. Are children spreading the virus?
In a setting like a school where mask-wearing and social distancing are enforced, young children seem to not spread the virus very much when the rules and guidelines are being followed. One CDC review found little difference in community cases in counties with elementary schools open and those with remote learning.
If precautions aren't being taken, children infected with the coronavirus very well could spread it to adults. What isn't clear yet is how great that risk is.
To keep schools as safe as possible, continuing schoolwide mask and social distancing policies will be important. With teenagers in particular, mask rules can't hinge on whether the person has been vaccinated or not. Until herd immunity within the whole community is at a good level, social distancing and masking is still going to be the recommendation.
3. So, when can children get vaccinated?
Right now, the Pfizer vaccine is the only one in the US authorised for teenagers as young as 16. Before children under 16 can be vaccinated, clinical trials need to be completed in thousands of young volunteers to assess the vaccines' safety and efficacy.
Vaccine manufacturers Moderna and Pfizer both have trials under way with adolescents and expect to have data by late spring or early summer. If their vaccines are shown to be safe and effective, kids 12 and up could be vaccinated before school starts in the fall.
Realistically, young children probably won't be eligible for the vaccine until late fall or winter at the earliest. Moderna just announced on March 16 that it has started testing the vaccine in children ages six months to 11 years. Pfizer hasn't reached that stage yet, and these trials take time.
4. What's different about the vaccines children will get?
The composition of the COVID-19 vaccines for children is the same as used in adults – the difference is that children may require a different dose.
The first step in vaccine trials is to figure out the right dose. The companies want to find the lowest possible dose that is both safe and produces a target level of antibodies. For example, Moderna uses a 100-microgram dose in adults. It is testing three different doses for children under age 2 – 25, 50 and 100 micrograms – and two doses for children over age 2, at 50 and 100 micrograms.
Once the company determines the optimal dose, it will launch a placebo-controlled trial to test its effectiveness, in which some children will get a placebo and some will get the vaccine.
A rigorous system for paediatric vaccine trials is well established in the US. These trials are key to assessing the safety and efficacy of vaccines in children, which can differ from adults.
I am optimistic that a safe and effective vaccine will be available for children. Thus far, there have not been any safety signals from either the adult or adolescent studies that have been worrying to me as a paediatrician, but the studies still need to be done in children.
5. How can parents create safe play dates for children?
When I talk to parents, I explain that it's a risk-versus-benefit question. Each family has a different tolerance.
From a medical standpoint, the mental health of children and having them play with other kids is an important part of childhood.
I would say that unvaccinated children playing indoors without masks on is still not a great idea. The risk is just too high at this point. As weather warms up, I would encourage children to play outside. Ride bikes, play and socialise — just do it in a safe manner.
We all have pandemic fatigue, including medical professionals. As the weather gets warmer, I think everyone just wants to get back to normal. The worst thing we can do, right as we start to see a light at the end, is fall backward again — because that would just make it that much longer for everyone.
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