https://www.newsbuyback.com/2020/08/russia-covid-19-vaccine-registration-%e0%a4%94%e0%a4%b0-human-trial-%e0%a4%95%e0%a5%87-%e0%a4%aa%e0%a4%b9%e0%a4%b2%e0%a5%87-%e0%a4%95%e0%a4%b9%e0%a4%be%e0%a4%82-%e0%a4%97%e0%a4%a1%e0%a4%bc%e0%a4%ac/
Russia Covid-19 Vaccine : Registration और Human Trial के पहले कहां गड़बड़ी हुई? | WHO | Coronavirus