While vaccines significantly reduce the chances of a severe Covid19 infection, no one knows for how long.

Data shows a four-week period between Covishield doses leads to a 55% efficacy rate.

An 81% efficacy rate doesn't mean a vaccine only works 81% of the time.

Given kids' cognitive and emotional immaturity and legal dependency, it's questionable whether they can truly consent to medical research.

Fever and general unwellness are signs the vaccine is working and training the immune system to fight the virus.

The analysis suggests that dose alone could curb transmission by two-thirds.

Vaccine hesitancy among frontline workers has caused nearly all states to miss their vaccination targets.

The measles vaccine has been the most life-saving immunization.

The question is uniquely important to India, where the government has agreed to subsidize only the first round of vaccine doses.

The government has approved the export of both Covishield and Covaxin to 12 nearby countries as a "goodwill gesture."

A rumor that the Chinese vaccine contains pork-derived gelatin has prompted clerics to fast-track halal approval in the name of public health.

The current confusion, suspicion at the approval of Bharat Biotech’s vaccine is further evidence of the public's lack of trust in healthcare institutions during the pandemic.

The statement challenges anti-abortion activists who have condemned several Covid19 vaccines that use tissue from aborted fetuses.

The vaccine's low price, combined with its low-maintenance storage, makes it one of the most accessible for Indians.

The Covid19 pandemic and related lockdowns have caused families all over the world to fall behind on children’s vaccine schedules.

There's a lot that must happen before you can get the shots from your doctor.

“We should have started [planning] last month,” said retired bureaucrat and public health expert PV Ramesh.

The first vaccine to market may not provide the longest-lasting immunity, experts warn.