Physics covers a wide range of phenomena, from elementary particles (such as quarks, neutrinos, and electrons) to the largest superclusters of galaxies. Included in these phenomena are the most basic objects composing all other things. Therefore, physics is sometimes called the  fundamental science .
Two types of influenza vaccines are available: 1  TIV (flu shot (injection) of trivalent (three strains; usually A/H1N1, A/H3N2, and B) inactivated (killed) vaccine) or. 2  LAIV (nasal spray (mist) of live attenuated influenza vaccine.)
The flu vaccine is available as a shot and a nasal spray. The nasal spray vaccine is for healthy children and adolescents ages 2 to 17 (and in healthy adults ages 18 to 49). It is recommended, instead of the shot, for healthy children ages 2 to 8 years old.