Shelf life of vaccines likely to be more than 3 months, unlike drugs

Unlike the Covid-19 drugs, such as remdesivir and favipiravir, which were allowed only a three-month shelf life after they got restricted emergency-use authorisation from the Indian regulator, vaccines now may be allowed a longer shelf life, revealed people in the know.
 
Vaccine makers have been conducting early animal testing since May/June. They have the stability data for these investigational products, said a source. "The vaccines will be allowed a shelf life of six months or more since the makers have the data for this period," said a pharmaceutical executive.
 
The stability of a drug or vaccine refers to