Question....whatever immunity was provided by the shots did not last long because the virus mutated into different strains. What is the difference with natural immunity that makes it life long? Or is natural immunity only effective against the strain it was created against?
Question....whatever immunity was provided by the shots did not last long because the virus mutated into different strains. What is the difference with natural immunity that makes it life long? Or is natural immunity only effective against the strain it was created against?
Question....whatever immunity was provided by the shots did not last long because the virus mutated into different strains. What is the difference with natural immunity that makes it life long? Or is natural immunity only effective against the strain it was created against?