What's causing rare allergic reactions to Pfizer's vaccine? By Yasemin Saplakoglu Several severe allergic reactions that were reported among hundreds of thousands of people vaccinated with the Pfizer-BioNTech coronavirus vaccine last week.
Is the new UK coronavirus variant more contagious? By Rachael Rettner The variant has a mutation that may make the virus "sticker" or allow it to bind more tightly to human cells.
1st wild animal in US infected with SARS-CoV-2 found in Utah By Nicoletta Lanese A wild mink just tested positive.
Coronavirus relief funds could easily pay to stop the worst of climate change (Op-Ed) By David L. McCollum As of late summer, governments around the world had pledged US$12.2 trillion of relief in response to the coronavirus pandemic.
There's a new coronavirus variant in the UK. Here's what we know. By Nicoletta Lanese Vaccines will likely work just as well against the variant.
1st dose of COVID-19 vaccine given in New York By Yasemin Saplakoglu On Monday (Dec. 14), the very first doses of Pfizer's COVID-19 vaccine was given in the U.S., marking the start of a long campaign to vaccinate the U.S. public.
COVID-19 vaccines: The new technology that made them possible By Yasemin Saplakoglu Here's how mRNA vaccines work, and why they could make such a difference for vaccine development.
Why an Australian COVID-19 vaccine caused false-positive HIV tests By Rachael Rettner The vaccine appeared safe and effective, but some participants falsely tested positive for HIV.
When will COVID-19 vaccines start to make a difference? By Nicoletta Lanese A new model projects how case rates, hospitalizations and deaths will fall as COVID-19 vaccinations begin.
Chinese-made COVID-19 vaccine is 86% effective, early data suggest By Nicoletta Lanese The United Arab Emirates has approved the vaccine based on this data.
Pfizer's COVID-19 vaccine starts to work just 10 days after 1st dose By Rachael Rettner Overall, the vaccine was 52% effective after the first dose and 95% effective after the second dose.
What are the symptoms of COVID-19? By Stephanie Pappas How will you know if you have the novel coronavirus that causes the COVID-19 disease? Here are the most common symptoms.
COVID-19 quarantine now 10 days, 7 with test, CDC says By Nicoletta Lanese The recommendations for self-isolation — for people who test positive for COVID-19 — have not changed.
UK approves Pfizer's coronavirus vaccine By Yasemin Saplakoglu The first doses of Pfizer's coronavirus vaccine will likely roll out in the U.K. next week.
COVID-19 may have arrived in US by December 2019 By Rachael Rettner Researchers studied blood samples from December 2019, and found a small number tested positive for antibodies against the virus.
Moderna's coronavirus vaccine is highly effective, final analysis shows By Yasemin Saplakoglu New data from Moderna's phase 3 trial confirm that the vaccine is highly effective and protects against severe disease.
Escaped mink could spread the coronavirus to wild animals By Nicoletta Lanese More than 100 SARS-CoV-2 infected mink may have escaped from Danish farms, raising the risk that these escapees could spread the novel coronavirus to wild animals.
Here are the most promising coronavirus vaccine candidates out there By Yasemin Saplakoglu Scientists around the world are creating dozens of unique vaccine candidates to fight the novel coronavirus — and they're doing it at unprecedented speeds.
SARS-CoV-2 relative found lurking in frozen bats from Cambodia By Nicoletta Lanese For the first time, close relatives of the novel coronavirus have been found outside China.
Americans celebrated Thanksgiving during a pandemic before. Here's what happened. By Brandon Specktor How did Americans celebrate the holidays during the influenza pandemic of 1918? With a lot of partying, turns out.
