Moderna Says Its Covid-19 Booster Shots Show Promise Against Variants
Moderna Says Its Covid-19 Booster Shots Show Promise Against Variants © apu gomes/Agence France-Presse/Getty Images Booster shots under development by Moderna Inc. helped improve immune responses against some variants among people given the company’s Covid-19 vaccine in an early study, the biotech company said Wednesday. The results, though preliminary, are a sign that adding booster shots several months after original vaccinations could bolster people’s immunity against more contagious strains of the virus. The company tested giving people boosts with either a single dose of its origi...