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Annual Covid-19 vaccine booster shots are likely to be needed, according to Pfizer CEO

Blood clots are more likely after Covid-19 than after vaccination

Pfizer, Modern vaccines can also cause ultra-rare blood clots, study claims

Unemployment claims fell to a new pandemic drop last week

CDC identifies a small group of covid-19 infections among fully vaccinated patients

Fentanyl has spread westward and overdoses are increasing

Variants increase Covid-19 overvoltage, but scientists express optimism about vaccines

Denmark becomes the first country to permanently abandon the use of the AstraZeneca vaccine

Exercising about 22 minutes a day can reduce the risk of severe COVID or death

American Airlines plans to extend the summer flight schedule