Not sure if vaccines are working but the Covid cases in India seems to be reducing by significant amounts. As a result, their stock market BSE (Bombay Stock Exchange) has since rebounded and continued on an upward trajectory.
India is currently into day 226 of a country lockdown. This might also be contributing to its lowering cases of infections.
I also trace the Public Mutual's India Global Equity Fund and it has the similar pattern as the recovery.