Most districts dip below the required 176 days. America's traditional 180-day school year is more myth than reality in Illinois, as a jumble of state laws, rules and waivers allow districts to chip away instruction time, shorten school hours and cut the number of days students come to school.
The influenza virus nasal vaccine is a live virus vaccine. Influenza virus vaccine is also available in an injectable form, which is a killed virus vaccine. Influenza virus nasal vaccine works by exposing you to a small dose of the virus, which helps your body to develop immunity to the disease.
The nasal spray vaccine contains a live attenuated flu virus, but the virus is weakened so that it cannot cause the flu. The viruses in the nasal spray can't replicate in the warm temperatures of the lungs and other parts in the body.rivalent flu vaccines protect against two influenza A strains, H1N1 and H3N2, and one influenza B strain. Quadrivalent flu vaccines â offered for the first time in the 2013-2014 flu season â protect against the same strains as the trivalent vaccine, as well as an extra influenza B virus.