Pfizer Inc said on Monday its experimental vaccine was more than 90% effective in preventing COVID-19 based on initial data from a large study, a major victory in the fight against the pandemic.

Pfizer's Canadian unit and BioNTech said they have received approval in Canada for their updated Comirnaty Covid-19 vaccine. The companies said Monday the updated vaccine targets the Omicron LP.8.1 ...

Pfizer Canada (PFE) and BioNTech (BNTX) announced that Health Canada has authorized the LP.8.1 variant adapted COMIRNATY COVID-19 vaccine for individuals aged 6 months and older. The updated COMIRNATY ...

LOS ANGELES -- The COVID-19 vaccines made by Pfizer and Moderna both require two doses to be administered, several weeks apart, for them to be fully effective. But there has been some scientific ...

On December 18, a San Diego emergency room nurse was given a shot of the COVID-19 vaccine. A week later, he tested positive for the virus, CNN affiliate KGTV reported. Stories like this will become ...

Amid uncertainty over how the Trump administration would approach mRNA COVID-19 vaccines for the upcoming respiratory virus season, the FDA has approved updated shots from Pfizer and Moderna. But ...

The COVID-19 vaccine rollout in 2025 is shaping up to be significant different than in past years. The U.S. Food and Drug Administration has approved updated vaccines under new guidelines, but the U.S ...

Some say they deserve a real dose right away. Others say the trial must go on. With Pfizer and its partner BioNTech on the cusp of an authorized COVID-19 vaccine in the United States, a major ethical ...

The vaccine was developed by Pfizer and BioNTech. The Food and Drug Administration authorized the United States' first COVID-19 vaccine for people age 16 and over late Friday, a historic moment in a ...