Many vaccines have multiple doses. DTaP for example is 5 shots and Polio is 4. They are also normally spread out much farther than the 3 or 4 weeks the COVID va

Many vaccines have multiple doses. DTaP for example is 5 shots and Polio is 4. They are also normally spread out much farther than the 3 or 4 weeks the COVID vaccines are separated. Other vaccines are more like 6 months to years apart. https://www.cdc.gov/vaccines/schedules/hcp/imz/child-adolescent.html https://www.cdc.gov/vaccines/schedules/hcp/imz/child-adolesc...