Covid-19: Examining theories for Africa’s relatively low death rates from pandemic

It should be noted however that a systematic review of global data – while confirming that warm and wet climates seemed to reduce the spread of Covid-19 – indicated that these variables alone could not explain most of the variability in disease transmission. It’s important to remember that there’s considerable weather variability throughout Africa. Not all climates are warm or wet and, if they are, they may not stay that way throughout the year. Other suggestions include the possibility of pre-existing protective immune responses due either to previous exposure to other pathogens or to BCG vaccination, a vaccine against tuberculosis provided at birth in most African countries. A large analysis – which involved 55 countries, representing 63 percent of the world’s population – showed significant correlations between increasing BCG coverage at a young age and better outcomes of Covid-19.

Covid-19: Examining theories for Africa’s relatively low death rates from pandemic

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