Nasal vaccines preventing COVID-19 virus before getting to the lungs may be more effective than others.

Researchers believe they work analogously to oral mucosal vaccines.

The government approved the inclusion of an intranasal Covid vaccine on December 23.

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The booster dose in the vaccination programme for adults comes amid a surge in cases in China and some other countries.

Vaccine iNCOVACC is a two-drop Bharat Biotech-made nasal vaccine would be on the Co-WIN platform this evening.

Currently the vaccine will only be available at private centres.

This is a heterologous booster dose.

Heterologous boosting is when a person is administered a different vaccine from the one that was used for the primary dose series.

It is a needle-free vaccine approved by the Drugs Controller General of India for an emergency situation.