Coronavirus

By Aya Elamroussi, CNN The US has surpassed 20,000 new Covid-19 cases for the fourth day in a row as the highly contagious Delta variant persists in its track in being the most common form of the coronavirus in the country. The last time the country had back-to-back days of cases topping 20,000 was in

By Jacqueline Howard, CNN Even though the biopharmaceutical company Pfizer has announced that it might be time to consider giving a third dose of its coronavirus vaccine to people, many doctors and public health officials argue that it’s more beneficial to get shots into the arms of the unvaccinated right now than to boost those

By Lauren Mascarenhas, CNN The US Centers for Disease Control and Prevention on Friday updated its Covid-19 schools guidance to emphasize in-person schooling is a priority in the fall, regardless of whether all mitigation measures can be implemented. As K-12 schools will have a mix of vaccinated and unvaccinated people, the agency says it’s still

By Maggie Fox, CNN Drugmaker Pfizer said Thursday it is seeing waning immunity from its coronavirus vaccine and says it is picking up its efforts to develop a booster dose that will protect people from variants. Pfizer said it would soon publish data about a third dose of vaccine and submit it to the US

By Maggie Fox, CNN The coronavirus pandemic almost certainly originated from an animal, probably at a wildlife market in China, and not from a laboratory leak, a group of virus experts said Wednesday. Theories about a lab leak are almost all based on coincidence, not hard evidence, the group of 20 top experts from the