An analysis by Public Health England found that the Pfizer-BioNTech and AstraZeneca vaccines were 96% and 92% effective against hospitalization due to the COVID-19 Delta variant, respectively.
Patients who received expired doses of COVID-19 vaccine are advised to visit a vaccination site and get another shot of the vaccine.
The CDC said its vaccine safety monitor system received 275 reports of myocarditis or pericarditis in 16- to 24-year-olds who received their final dose of the COVID-19 vaccine as of May 31.
Israel's Health Ministry has recorded at least 275 cases of myocarditis, an inflammation of the heart muscle, among men between the ages of 16 and 30.
The shots were found to provide protection against symptomatic cases of COVID-19 two weeks after the second dose.
Combining COVID-19 vaccines produces a potent immune response against the virus SARS-CoV-2, a study has found.
The FDA has authorized a longer storage time for thawed Pfizer COVID-19 vaccines to make them more widely available.
A health care company is being sued for "overly diluting" COVID-19 vaccines to get a seventh dose.
Experts say they hope to report the data in the coming months.
A recent survey showed that vaccine hesitancy is making it more difficult for some states to achieve the vaccination goal set by the Biden administration.
The renowned infectious disease expert and Rutgers University professor passed away on April 28 in India. He visited the country in March-end to help care for his family.
Pfizer's mRNA COVID-19 vaccine is currently the company's biggest source of revenue.
Pfizer is holding a clinical trial to test its COVID-19 vaccine on babies as young as 6 months old.
Pfizer's treatment uses a man-made molecule that could prevent COVID-19 from reproducing in a subject's nose, throat and lungs.
Not getting the second coronavirus vaccine dose could make recipients more vulnerable to dangerous and more infectious COVID-19 variants.
The fake Pfizer COVID-19 shots contained anti-wrinkle treatment instead of the vaccine, authorities say.
Tourists traveling to Anchorage, Fairbanks, Juneau or Ketchikan airports will receive a shot of the Pfizer or Moderna COVID-19 vaccine beginning June 1.
The B.1.351 COVID-19 variant, first detected in South Africa, may be able to evade protection provided by first-generation vaccines.
Researchers found the COVID-19 variant's prevalence rate was much higher in patients who received one or two doses of Pfizer's vaccine.
A recent study has found that recipients of the Moderna COVID-19 vaccine experienced more side effects than those who got the Pfizer shot.
Trials showed that the Pfizer vaccine provides 100% protection against COVID-19 in children ages 12 to 15.
Doctors warn recipients not to panic as side effects from the vaccine mean it's working.