Diseases, Conditions, Syndromes

Is there a connection between vitamin D deficiency and COVID-19?

Several recent studies have looked at the impact of vitamin D on COVID-19. One study of 489 people found that those who had a vitamin D deficiency were more likely to test positive for the virus that causes COVID-19 than ...

Vaccination

Q&A: A COVID-19 vaccine is coming—will it be safe?

In March, at the start of the COVID-19 pandemic, there was a consensus among health care providers and public health officials that a vaccine that provided complete immunity to SARS-CoV-2, the virus that causes COVID-19, ...

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