Covid is a fictional disease. No virus has ever been proven to exist by direct real time observation, visualization, acquirement, purification, characterization and verification. I mean all so called disease causing bio viruses.
In regards to vaccines. No vaccine ever has been tested by having injected subjects exposed to purified viruses as it allegedly occurs in nature.
No immune system with memory has been proven either.
Levels of antibodies depend on damage that occurs in our bodies, i.e., less damage means less antibodies required. High levels of them disrupt standard physiological processes.
In hospitals there are only people affected by one or more of the 6 factors, i.e., stress, toxins, malnutrition, unnatural EMF radiation, physical trauma and aging.