It's possible, Sette said, that your prior infections with the common cold could give your immune system a boost, making it easier to fight off the coronavirus that causes COVID-19.

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Experts told ABC News that as winters have gone by, more immunity has built up in the population. MORE: US intel chiefs testify on China's influence and challenges of investigating COVID-19 ...

Even if you’ve already had COVID-19 and even if you plan to get a booster this fall, when variant-specific vaccines are expected to be available, experts who spoke with ABC News widely agreed ...

ABC News contacted health departments in all 50 states. Many did not have the data readily available and at least 10 states said they never tracked reinfections during the COVID-19 pandemic.

Six months after COVID-19 was declared a national emergency, ABC News looks back at what went wrong, questions still unanswered and where we go from here.

The U.S. is now reporting more than 94,000 new COVID-19 cases each day. With coronavirus infection rates back on the rise, many Americans are wondering why the U.S. is, once again, experiencing ...

European Commission President Ursula von der Leyen faces a rare no-confidence vote in the European Parliament this week ...

Nearly 170,000 new pediatric COVID-19 cases were confirmed last week. With millions of Americans set to travel and gather for Christmas and the New Year, families across the country are scrambling ...

ABC News got an exclusive look inside Curative's coronavirus testing lab. As COVID-19 cases surge nationwide, so are the number of options to test for coronavirus infection. The Trump ...

ABC News spoke with two infectious disease experts about how at-home COVID-19 rapid tests work and how they should be used.

COVID-19 origins: What to know about ... MD, a resident physician in internal medicine at Northwestern Memorial Hospital, is a contributor to the ABC News Medical Unit. Editor’s Picks.