REUTERS: A single dose of Johnson & Johnson's experimental COVID-19 vaccine produced a strong immune response against the novel coronavirus in an early-to-mid stage clinical trial, according to interim results published on Friday .
The vaccine, called Ad26.COV2.S, was equally well-tolerated at two different doses, the results showed. A single shot, versus a rival two-dose approach being tested by Moderna and Pfizer, could simplify distribution of the vaccine.However, it is unclear whether elderly people, one of the populations most at risk from the virus, will be protected to the same degree as younger people with the J&J vaccine.
The trial in close to 1,000 healthy adults, which is backed by the US government, began after the J&J vaccine was found in July to offer strong protection in a single dose to monkeys. Based on the current results, J&J on Wednesday kicked off a final 60,000-person trial, which could pave the way for an application for regulatory approval. The company said it expects results of that so-called Phase 3 trial by the end of the year or early next year.
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