Three Covid-19 vaccinations offer protection against severe symptoms even after four months, according to a study from Denmark, one of the countries first hit by the fast-spreading omicron variant.
More than 121 days after being administered, third doses of vaccine still offered as much as 77.3% protection against symptoms that require hospitalization, the study found.
Denmark estimates that about 70% of its adult population contracted omicron from November to March. The Nordic country ended all virus restrictions on Feb. 1 because a high vaccination rate prevented omicron from overburdening its hospitals.
The study, published by Denmark’s Statens Serum Institut ...