For years nasal sprays have helped people with allergies. Recently, treating migraines, depression and opioid overdoses joined the list. There’s even an intranasal option for the flu vaccine. Doctors ...
Dr. Curiel says vaccines in nasal form target the airway, where a respiratory virus enters the body. “A systemic injection, like MRNA, will augment antibodies in the blood, not so much in the lung.