Most vaccines are administered by injection through intramuscular or subcutaneous route. But, intranasal vaccines are administered as a nasal spray and offer a needle-free approach for vaccine administration, Choubey said in a written reply.
“The interval period between the two doses is presently 21 days. The schedule will be finalized after the phase I clinical trial data. Currently, in phase I clinical trial, single dose and two dose schedules are being tested,” the minister said.