Pfizer to supply US with additional 100 million doses of COVID-19 vaccine
The US government has ordered 100 million additional doses of the Pfizer/BioNTech COVID-19 vaccine: doubling its order of the authorized vaccine.
The US government has ordered 100 million additional doses of the Pfizer/BioNTech COVID-19 vaccine: doubling its order of the authorized vaccine.
People who have been infected with SARS-CoV-2 retain immune memory to protect against reinfection for 'at least eight months', according to Australian scientists. "This research is the strongest evidence for the likelihood that vaccines against the virus...