More than half of Americans have had Covid, including three of four children

A CDC report showed a striking increase in those with coronavirus antibodies between December and February

More than half of Americans show signs of a previous Covid-19 infection, including three out of every four children, according to a new report released on Tuesday.

The findings from the Centers for Disease Control and Prevention (CDC) come after researchers examined blood samples from more than 200,000 Americans and looked for virus-fighting antibodies made from infections, not vaccines. They found that signs of past infection rose dramatically between December and February, when the more contagious Omicron variant surged through the US.