Which vaccine is available as a nasal spray?

The live attenuated influenza vaccine (LAIV) is available as a nasal spray, making it unique among the listed options. This vaccine contains weakened forms of the influenza virus that stimulate an immune response without causing the disease. The nasal spray format is particularly beneficial as it is easy to administer, especially for individuals who may be hesitant about receiving an injection.

The other options do not come in a nasal spray format. The herpes zoster vaccine is administered via injection, targeting the reactivation of the varicella-zoster virus. The pneumococcal vaccine and the hepatitis B vaccine are also given through injections. This distinction highlights the LAIV as a more accessible choice for influenza vaccination, particularly in populations such as children and individuals who prefer non-injection methods.