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And the breakthrough cases we see are by and large in the extremely elderly or people who are severely immunocompromised and were not able to achieve adequate protection from their first vaccine doses

Sometimes, injecting it into a muscle can help increase the supplements effectiveness

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"The data and hypothesis are very intriguing, but much additional investigation is required to determine if this is a real cause-and-effect phenomenon," said Josh Miller, a professor of nutritional sciences at Rutgers University who was not involved with the study