Coronavirus LIVE Updates: India's Covid-19 Tally Crosses 57 Lakh-mark With Over 86,000 New Cases; J&J Kicks Off Study of Single-shot Covid-19 Vaccine

Coronavirus LIVE Updates: Johnson & Johnson began a 60,000-person trial of an experimental single-shot COVID-19 vaccine that, if proven effective, could simplify distribution of millions of doses compared with leading rivals requiring two doses.