Pfizer

How British scientists tracked down the new Covid-19 variant

States are imposing the strictest Covid-19 lockdowns since the spring

Salud expected more vaccines from Pfizer

Pharmacist injected with four doses of Pfizers vaccine: report

Pfizer is close to a deal with the Trump administration to deliver an additional 100 million vaccine doses

Pfizer Approaches Trump Deal; Tens of millions of additional vaccine doses

New strain of coronavirus splits scientists as UK and others act to stop spread

Covid-19 variant may make herd immunity more difficult, BioNTech says

Pfizer, Moderna tests COVID-19 vaccines against a new strain

US Army Scientists Analyze New COVID-19 Strain