Variant

As India reopens after a devastating second wave of coronavirus infections, virologists worry that another, potentially more virulent version of the virus could accelerate the onset of a third wave within a few months.The version known…

White House senior medical advisor Dr. Anthony Fauci said Tuesday the highly contagious Delta variant is the "greatest threat" to the nation's attempt to eradicate Covid-19.Delta, which was first identified in India, now accounts for about…

The super-contagious Delta variant of the coronavirus is now responsible for about one in every five Covid-19 cases in the United States, and its prevalence has doubled in the last two weeks, heath officials said on Tuesday.First identified…

The highly contagious delta variant is the fastest and fittest coronavirus strain yet, and it will "pick off" the most vulnerable people, especially in places with low Covid-19 vaccination rates, World Health Organization officials warned…

A joint government and NHS public information display will indicate that a Covid-19 variant concern has been identified locally and will provide guidance to residents on June 11, 2021 in Hounslow, UK.Mark Kerrison | In pictures | Getty…

Given the surge in vaccinations and declining death rates related to Covid-19 in Europe and other parts of the world, many people are planning to travel this summer and beyond. However, experts say the fast-circulating delta variant is a…

President Joe Biden speaks about reaching 300 million COVID-19 vaccination shots, in the State Dining Room of the White House, Friday, June 18, 2021, in Washington.Evan Vucci | APPresident Joe Biden on Friday doubled down on his…

A mobile Covid-19 vaccination center in front of Bolton City Hall in Bolton, where the number of cases of the Delta variant identified for the first time in India was relatively high.Peter Byrne | PA pictures | Getty ImagesThe variant of…

Dr. Peter Hotez warned that southern US states could feel the effects of the highly transmissible Delta-Covid variant as early as this summer, in part due to low vaccination rates. "I'm really holding my breath about the south and what's…

Dr. Scott Gottlieb told CNBC on Wednesday he believes enough Americans are fully vaccinated to delay the risk presented by the Delta Covid variant."The question is: Are there enough unvaccinated people that this could get into the…