https://youtu.be/TAN7-Z_I3AU?si=UV7SewwDtDtVknnO
Look into Bifidobacterium and Covid-19.
Dr Sabine Hazan a part of the Independent Medical Alliance (Dr Pierre Kory - Joe Rogan’s Ivermectin Doctor).
It was discovered that the vaccine was actively destroying Bifidobacterium which is connected to an all manner of health problems.
People with more severe covid outcomes all had low to non-existent Bifidobacterium hence it affecting the elderly disproportionately.
People with long-covid (such as me) have gut dysbiosis with a distinct lack of Bifidobacterium.
When Dr Sabine Hazan brought this up Bill Gates either withdrew funding or challenged her efforts in some way. Apologies I cannot remember the exact specifics.
More recently she has had her papers detailing this removed from certain medical journals for no legitimate reason.