Booster dose: Bharat Biotech's nasal vaccine may be used with Covaxin

Bharat Biotech is working on a three-legged clinical trial for its intranasal vaccine BBV154, which is in phase two. The Hyderabad-based firm is testing the efficacy of a combination in three modes – two intranasal shots, first a Covaxin shot followed by the nasal vaccine, and Covaxin following a nasal shot.
 
The idea is to see which combination induces better and long-lasting immune response. Therefore, the intranasal vaccine could be used as a combination with the intramuscular Covaxin shot.
 
“While the nasal vaccine can be administered as two shots, the company is testing whether combining it with Covaxin