They are! Inhaled flu vaccines are generally live attenuated virus, which isn't recommended for everyone but is perfectly effective for a large segment of the p

They are! Inhaled flu vaccines are generally live attenuated virus, which isn't recommended for everyone but is perfectly effective for a large segment of the population: https://www.cdc.gov/flu/prevent/nasalspray.htm https://www.cdc.gov/flu/prevent/nasalspray.htm