Some Vaccines Last a Lifetime. Here’s Why Covid-19 Shots Don’t. – The Wall Street Journal

Why don’t Covid-19 vaccinations last longer?

Measles shots are good for life, chickenpox immunizations protect for 10 to 20 years, and tetanus jabs last a decade or more. But U.S. officials are weighing whether to authorize Covid-19 boosters for vaccinated adults as soon as six months after the initial inoculation.

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