Quite literally nobody in the entire world knows that exactly. This is as close to bleeding edge as you can get, it's an ongoing area of research. "detailed un

Quite literally nobody in the entire world knows that exactly. This is as close to bleeding edge as you can get, it's an ongoing area of research. "detailed underpinning immunological mechanisms were not fully known" https://www.frontiersin.org/articles/10.3389/fimmu.2019.01628/full https://www.frontiersin.org/articles/10.3389/fimmu.2019.0162...