Do you need a second COVID booster? 'It depends,' Penn Medicine experts say - witf.org

In a study published earlier this month, Penn researchers found that just two doses of an mRNA vaccine generates significant antibodies, which act like a shield against viruses.

April 18, 2022 | 10:07 AM

• Zoë Read/WHYY

Since last month, people over age 50 have been eligible to receive a second COVID-19 booster vaccine at least four months after their third… [+7538 chars]

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