By that logic it would be Cure ...progression of a medical condition. Just saying. COVID vaccines are preventive treatments that train your body to recognize and quickly fight a COVID-19 infection. https://my.clevelandclinic.org/health/procedures/covid-vaccine Like I said, I understand not wanting to use the term that way. Doesn't mean it's wrong. What is a vaccine? A vaccine is a medical treatment that helps your body’s immune system recognize and fight disease. https://www.hopkinsmedicine.org/health/treatment-tests-and-therapies/