“After getting a true vaccine, like for polio or measles...”
Actually virtually all cases of polio in the past 40 years have come from the vaccine itself. And whatever protection there is, is only temporary.
Being vaccinated for measles makes one more susceptible to atypical forms of measles. Following the WHO advice and taking 200000 IU vitamin A for 2 days (or some variation) might be much safer. Or just make sure that your dietary intake of vitamins A, Bcomplex, C, D3, K plus zinc and iodine are high enough, and you will very likely never have a problem with any viral illness.
“We do not have a true vaccine for COVID-19.”
And we never will.
Before the polio vaccination campaign in Africa began in 1996, 75,000 children a year were paralyzed by wild polio. Now there are a total of about 140 cases of polio a year. These are facts.
"“We do not have a true vaccine for COVID-19.” And we never will."
President Trump disagrees with you.