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.
Like all seasonal flu vaccines, vaccines that protect against four flu viruses will be monitored for their safety and effectiveness. Quadrivalent vaccine cannot cause influenza illness, because the vaccine viruses used to make it are âinactivatedâ (killed) or attenuated (weakened).he quadrivalent flu vaccine is designed to protect against four different flu viruses; two influenza A viruses and two influenza B viruses.