COVID-19 tests used to be able to detect a positive case within the first 48 hours, but many results are now delayed until four days after symptoms appear, according to the LA Times. Elizabeth Hudson, ...

As governments the world over seek ways to jumpstart economic activity, one proposal is a so-called “immunity passport” that would allow certain people who test positive for COVID-19 antibodies to ...

A Feb. 16 study in the Lancet medical journal found that, for people who had COVID-19 immunity resulting from infection, protection from severe disease and death remained high for at least 10 months.

"We feel this pressure because we want to help people." Antibody tests, which reveal whether someone has been infected with the novel coronavirus, have been touted as key to reopening the economy and ...

As mask mandates are lifted and restrictions removed in a step toward normalcy, a test to measure immunity would be a powerful tool to measure individual risk. In 2010, doctors told Ben Sobieck, now ...

In a recent preprint* study posted to the medRxiv server, a team of researchers evaluated the impact of hybrid immunity (combining vaccination and recovery from infection) on severe acute respiratory ...

With COVID-19 rising this winter, it’s getting more complicated to discern whether you are infected. Dr. Elizabeth Hudson, regional chief of infectious diseases at Kaiser Permanente Southern ...

The Centers for Disease Control and Prevention released a preliminary risk assessment on the COVID-19 variant labeled BA.2.86, which was first detected in Denmark and Israel. The CDC said at least two ...

The immune system’s first encounter with a virus or vaccine establishes a “starting template” that shapes its response to new ...

Such a treatment also may help determine how many people were exposed. With a limited supply of COVID-19 tests in the United States, people with mild symptoms are less likely to be tested, leaving ...