Diseases, Conditions, Syndromes

EXPLAINER: Are new coronavirus strains cause for concern?

Reports from Britain and South Africa of new coronavirus strains that seem to spread more easily are causing alarm, but virus experts say it's unclear if that's the case or whether they pose any concern for vaccines or cause ...

Medical research

Messenger RNA: How a long shot idea led to COVID-19 vaccines

Hungarian-born scientist Katalin Kariko's obsession with researching a substance called mRNA to fight disease once cost her a faculty position at a prestigious US university, which dismissed the idea as a dead end.

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