Ключевые слова: america, american, background, biological, care, cell, concord, country, covid, covid19, disease, dose, drug, flu, hampshire, health, immunity, infectious, injection, map, medical, medicine, new hampshire, new hampshire map, north, north america, people, prevention, protection, recover, science, sick, spread, state, states, syringe, treatment, united, united states, us, us state, usa, vaccination, vaccine, virus,