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Homemade face masks 'need to be at least two layers', experts claim

Vipingo Ridge administration manager Chilson Lwangu (right) distributes face masks to fishermen at Shariani in Kilifi County. [Omondi Onyango, Standard]

Experts found one layer of cotton T-shirt material is fairly effective as a barrier against droplets expelled during speaking, but two are "significantly better at reducing the droplet spread caused by coughing and sneezing".

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