Ocugen stock soars after partner Bharat Biotech COVID-19 vaccine candidate shows 81% efficacy MarketWatchCriticized Indian Vaccine Already in Use Found 81% Effective BloombergBharat Biotech's COVID-19 shot 81% effective, Indian firm's interim data shows Yahoo NewsOpinion | Covid vaccination: How Modi inspired India TV NewsBharat Biotech's Covaxin Shows 81% Efficacy In Phase 3 Trials Conducted On 25k Subjects Republic WorldView Full Coverage on Google News