<https://www.ddw-online.com/sanofi-and-gsk-covid-19-vaccine-delayed-as-it-fails-to-produce-strong-immune-response-in-older-people-8788-202012/#newsarticle>
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<https://www.ddw-online.com/sanofi-and-gsk-covid-19-vaccine-delayed-as-it-fails-to-produce-strong-immune-response-in-older-people-8788-202012/>