Ailments In Covid-19 Trials Raise Questions About Vaccine Method
A heath worker draws the ‘Gam-COVID-Vac’, also known as ‘Sputnik V’, COVID-19 vaccine, in Moscow, Russia. (Photographer: Andrey Rudakov/Bloomberg)

Ailments In Covid-19 Trials Raise Questions About Vaccine Method

(Bloomberg) -- Two Covid-19 vaccines stalled by potential side effects have one key feature in common: Both are based on adenoviruses, cold germs that researchers have used in experimental therapie...
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