Perspectives Concerning SARS-CoV-2 Transmission for the Application of the Livestock Breeding

Viral transmission between animals and humans has been defined as Zoonosis and zooanthroponosis. The vaccine has been claimed to be the best tool to prevent viral epidemics. However, as learned from SARSCoV-2, vaccines cannot be the true answer to prevent viral infection for everyone. Some vaccinated persons are still reported to get infected. Viral mutation has been principally postulated to explain immune evasion. Questionable, why the mutated viral strain does not evade the immunity of everyone who has been vaccinated? Mutated viral strains cause various symptoms, nonsymptomatic to morbidity and mortality, in different individuals with more or less the same ratio as the original SARS-CoV-2. Approximately, 25-35% of the SARSCoV-2 detected individuals are asymptomatic, while 15- 20% developed severity and about 2-5% have critical symptoms [1,2]. Logically, the viral mutation could keep mutating in any part of its genome. The new variant might maintain infectivity in the same person and might develop to infect another person who once has not been susceptible to the original strain. Thus, the dynamics of viral infection could change from time to time. This requires a better explanation to lead us in the right direction to prevent the emergent virus either now or in the future.