India has delayed committing supplies of vaccines to the Covax global sharing platform, two sources told Reuters on Tuesday, a day after one of its key backers, the WHO, said the agency could not "cut corners" to approve a domestically developed vaccine.

The world's biggest vaccine maker resumed exports of Covid-19 doses this month for the first time since April. It has sent about four million to countries such as neighbouring Bangladesh and Iran, but none to Covax.

On Monday, in the run-up to an Oct 26 meeting on Covaxin, India's first domestically developed Covid-19 vaccine, the World Health...