Diseases, Conditions, Syndromes

CDC team: 'War has changed' as delta variant dangers emerge

New evidence showing the delta variant is as contagious as chickenpox and may be more dangerous than other versions has prompted U.S. health officials to consider changing advice on how the nation fights the coronavirus, ...

Diseases, Conditions, Syndromes

Sickle cell disease may up risk for poor COVID-19 outcomes

(HealthDay)—Sickle cell disease is associated with a fourfold increased risk for COVID-19-related hospitalization and a more than twofold increased risk for COVID-19-related death, according to a research letter published ...

Medical research

Vaccines from BioNTech/Pfizer and Moderna can be combined

More people in Norway are being offered a vaccine from the drug manufacturer Moderna for their second dose, even though they received a vaccine from BioNTech / Pfizer for their first dose. Combining vaccines provides similar ...


4 billion anti-COVID shots injected worldwide

Although more than four billion doses of anti-COVID vaccines have been administered around the world, poorer countries are still struggling to secure precious shots despite recent donations.

Diseases, Conditions, Syndromes

With virus surge, US to keep travel restrictions for now

The United States served notice Monday that it will keep existing COVID-19 restrictions on international travel in place for now due to concerns about the surging infection rate because of the delta variant.

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