Diseases, Conditions, Syndromes

'Hybrid immunity' gives best COVID protection: studies

People with the "hybrid immunity" of having been both fully vaccinated and previously infected with COVID-19 have the strongest protection against the virus, two new studies said on Friday.

Health

France to investigate food additive that harmed rats

France ordered an inquiry on Friday after scientists reported that a food additive widely used in Europe to whiten toothpaste and chewing gum could cause precancerous lesions in rats.

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