Moderna Says Covid-19 Vaccine Shows Signs of Working in Older Adults

The results are a sign the potential vaccine could protect older people who are especially vulnerable to the new coronavirus.

Photo: Paul Hennessy/Zuma Press

Moderna Inc. MRNA 6.42% said Wednesday its experimental coronavirus vaccine induced immune responses in people aged 56 years and older that were comparable to those seen in younger adults in a small study, a promising sign for a vulnerable age group.

Older adults are at higher risk of hospitalization and death from Covid-19 than younger people. While Moderna and other companies are racing to develop vaccines to protect people from the new coronavirus, some experts have been concerned that vaccines won’t offer as much protection in older adults.

The immune system generally weakens with age, which can make it harder for a vaccine to induce a sufficient immune response against disease.

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