It’s a weakened live virus, so I assume there is some risk of it becoming contagious. Fortunately it’s the flu and not polio. And I assume it’s also for the same reason as antibiotics; you don’t want people overusing it and making new, resistant flu strains.
It’s a weakened live virus, so I assume there is some risk of it becoming contagious. Fortunately it’s the flu and not polio. And I assume it’s also for the same reason as antibiotics; you don’t want people overusing it and making new, resistant flu strains.