Mpox vaccine boosters necessary to restore faded protection, study shows - UPI.com Vaccine protection against mpox fades quickly in the human immune system, even in people who've received the full two-dose regimen, a new real-world study shows. UPI

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Antibody levels fell to low or near zero within the first few months of getting the vaccine, unless the person had previously received a smallpox vaccine, scientists reported Saturday at the European Congress of Clinical Microbiology and Infectious Diseases in Barcelona.

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