The outbreak occurred at the a Chilean research base on the Antarctic Peninsula.
Several severe allergic reactions that were reported among hundreds of thousands of people vaccinated with the Pfizer-BioNTech coronavirus vaccine last week.
The variant has a mutation that may make the virus "sticker" or allow it to bind more tightly to human cells.
As of late summer, governments around the world had pledged US$12.2 trillion of relief in response to the coronavirus pandemic.
Pigs that have been genetically engineered to be free of a molecule that triggers meat allergies have been approved by the Food and Drug Administration (FDA).
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.
A toxin from an ancient bacteria helps ticks survive and transmit Lyme disease to the humans they feed on, a new study finds.
A new model projects how case rates, hospitalizations and deaths will fall as COVID-19 vaccinations begin.
This comes after two National Health Service members developed allergic reactions to the vaccine on Tuesday.
Overall, the vaccine was 52% effective after the first dose and 95% effective after the second dose.