A big puzzle of the pandemic that why are children so much less likely than adults to become infected with the coronavirus, even if infected, less likely to become ill.
A possible reason may be that many children already have antibodies to other coronaviruses, according to researchers at the Francis Crick Institute in London.
They found that many children and some adults, carried one antibody in particular that can prevent coronaviruses from entering cells. This antibody attaches itself to a spike that pokes out of coronaviruses.
Now the researchers are planning to expand their study to monitor thousands of children and adults. Some have antibodies that can block the new coronavirus in lab tests. Others do not.
Another possibility is that most adults actually are protected by memory cells from previous infections with the common cold. Although few have enough antibodies in their blood to protect them at any given time, they may be able to quickly make antibodies to lessen the impact of the new coronavirus.