Guess they're trying to hide Antibody-dependent Enhancement (ADE) that was predicted based on animal research with SARS.
" Conclusions
These SARS-CoV vaccines all induced antibody and protection against infection with SARS-CoV. However, challenge of mice given any of the vaccines led to occurrence of Th2-type immunopathology suggesting hypersensitivity to SARS-CoV components was induced. Caution in proceeding to application of a SARS-CoV vaccine in humans is indicated."
https://pubmed.ncbi.nlm.nih.gov/22536382/
Since the "delta variant" = "India variant"
https://www.cnbc.com/2021/07/23/coronavirus-how-india-is-doing-now-after-delta-variant-spread.html
AND
Ivermectin was very effective against it
"Ivermectin obliterates 97% of Covid-19 cases in Delhi"
https://covid.us.org/2021/06/27/ivermectin-use-in-india/
Why the vaccine push? It is obviously (still) absurd & totally unnecessary..