It might pay to know more about the origins of the commie virus, because some sources say that SARS-CoV-2’s most ancient ancestor was a pig virus rather than a bat virus. When we dig further, we find that this report from Porton Down, UK links to the American pig virus, PRRSV. Here is our initial comparison with the Delta variant:
Porton Down, UK / Delta Variant B.1.617.2
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has undergone progressive change, with variants conferring advantage rapidly becoming dominant lineages, e.g., B.1.617. With apparent increased transmissibility, variant B.1.617.2 has contributed to the current wave of infection...
pubmed.ncbi.nlm.nih.gov
’....Individuals infected previously by these variants may be more suscpetible to reinfection by B.1.617.2. This observation provides important new insights for immunization policy with future variant vaccines in non-immune populations.’
A similar modus operandi is seen in PRRSV:
’PRRSV is readily transmitted to susceptible sows via the semen of infected boars. Virus is shed in the semen of infected boars for as long as 43 days, and viral RNA can be detected up to approximately 100 days. Venereal infection of gilts and sows usually results only in transient anorexia, inappetence, and lethargy, but not reproductive disease, whereas subsequent spread of the virus from these animals to susceptible sows in late gestation can result in reproductive failure and sow mortality.’
(Arterivirus Pathogenesis and Immune Response, Ch. 21, in Nidoviruses, ASM Press, 2008)
We base these current speculations on this report from India:
Dec 2020 India: Zoonotic Evolution
The outbreak and spread of new strains of coronavirus (SARS-CoV-2) remain a global threat with increasing cases in affected countries. The evolutionary tree of SARS-CoV-2 revealed that Porcine Reproductive and Respiratory Syndrome virus 2, which belongs to the Beta arterivirus genus from the...
pubmed.ncbi.nlm.nih.gov
’....The evolutionary tree of SARS-CoV-2 reveals that Porcine Reproductive and Respiratory Syndrome Virus 2 (PRRSV-2), which belongs to the beta Arterivirus genus from the Arteriviridae family is possibly the most ancient ancestral origin of SARS-CoV-2 and other Coronaviridae.’