Vaccines are useful even when there is a treatment for a disease, contrary to claim by Lee Merritt in The New American video
Vaccines provide benefits even if there is a treatment available and if the survival rate of a disease is high. Unlike treatments, vaccines prevent a disease, thereby averting the risks associated with the disease. Furthermore, vaccines help to build herd immunity in a population, thereby protecting vulnerable individuals from severe disease and death. Randomized clinical trials showed that hydroxychloroquine provides no meaningful benefit for hospitalized COVID-19 patients and doesn’t prevent COVID-19.