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World

Swiftly waning COVID-19 immunity poses vaccination challenge

LONDON (Reuters) - Emerging evidence that the body's immune defence against COVID-19 may be short-lived makes it even harder for vaccine developers to come up with shots fully able to protect people in future waves of infection, scientists said on Tuesday.

World

Former Fiat engineer aims to put the brakes on COVID

MILAN (Reuters) - Fifty years ago, he designed a braking system that helped reduce fatal car crashes. Now Mario Palazzetti has invented a device he hopes will curb the spread of COVID-19.