Top covid vaccine in world according to efficiency
1) Pfizer / BIO N Tech using in US & Germany
2) Moderna using in US
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3) Johnson & Johnson / Janssen using in US & Belgium
4) AstraZeneca / Covisheild using in UK , Sweden (India as covisheild)
5) Sputnik V using in Russia ( India under trial for limited usage )
6) Sinovac / corona vac using in China
7)Nova Vax using in US
8) covaxin using in India ....