Just a farmer thinking out loud --
If the covid vaccines work by either stimulating your cells to produce antibodies, or by providing your cells with the information to produce that same response, then the antibody response depends on either introduction via the vaccine, or via viral infection (and/or some type of an antibody cocktail). If antibodies are built up by either prior infection or vaccine (or cocktail) responses, then the body can immediately minimize or eliminate the overall impact of a coronavirus infection. Because adequate antibody responses are not immediate, either vaccinations or effective therapeutics are necessary to fight the infection (and/or it's symptoms) until the body can build up sufficient antibodies in response to the infection. If antibodies wane over time, that does not mean that the body does not have the ability to fight off a new infection, yet it might take time for the body to regenerate antibodies sufficient to do the job quickly enough to survive, or to avoid hospitalization, etc. Some are saying that the antibodies produced via natural bodily responses (no vaccination) will last longer and provide better protection for a longer time. Some are saying vaccinated folks will need booster shots to juice-up antibody production. In any case, vaccinated or not, prior infection or not, these are not shields to prevent infection, they are methods that stimulate antibody production to fight the infection. Thus, everyone remains susceptible to infection or re-infection, and therefore, everyone remains a potential carrier and spreader. The key to overcoming covid likely depends on the effectiveness and availability of proven therapeutics that minimize or eliminate adverse covid symptoms while the body generates adequate antibody reactions to heal itself, either via vaccination (boosters) or natural bodily responses. The glaring weakness in CDC and HHS directions to medical facilities and practitioners -- effective therapeutics that are affordable and available to all.
