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https://celsogallicoimbra.com/2020/03/23/vitamin-d-ex-chefe-do-cdc-risco-de-infeccao-por-coronavirus-pode-ser-reduzido-pela-vitamina-d-former-cdc-chief-dr-tom-frieden-coronavirus-infection-risk-may-be-reduced-by-vitamin-d/
Vitamin D, ex-chefe do CDC: risco de infecção por coronavírus pode ser reduzido pela vitamina D - Former CDC Chief Dr. Tom Frieden: Coronavirus infection risk may be reduced by Vitamin D