Prisoners were injected with inoculations of disease, disguised as vaccinations, to study their effects. They should also receive annual influenza vaccinations. Common forms of preventive medication for sheep are vaccinations and treatments for parasites. Despite this, his parents declined the administration of subsequent tetanus boosters or other vaccinations. Annual influenza vaccinations in those with COPD reduce exacerbations, hospitalizations and death. Illness behaviors include taking medication as prescribed and getting vaccinations. AMA pushed for laws requiring compulsory smallpox vaccinations in 1899. It is not clear if annual influenza vaccinations affects the risk of exacerbations. Mandatory vaccinations for attending public schools have received criticism. The administration of human papillomavirus and hepatitis B vaccinations is recommended where resources allow. A cadre of Japanese physicians began to interact with Dutch doctors, who introduced smallpox vaccinations. Prisoners were injected with diseases, disguised as vaccinations, to study their effects. The CDC offers recommendations regarding who they feel should get booster vaccinations. Childhood vaccinations, or contraceptives save much more than they cost. Treatments include quitting smoking, vaccinations, rehabilitation, and often inhaled bronchodilators and steroids.