What seems to be clear to me is that after the primary infection most of the cells die indirectly, but at the later stage, when the viral load is very high, the virus kills a lot of cells directly. ↗
We've already seen proliferation. We started it with Britain, then France. Then we benignly let the Israelis do it. The Pakistanis and the Indians have recently done it. The Chinese have nuclear weapons. ↗
Leaving England was a painful decision, and we still have some regrets about it. However, at that time, the research environment for theoretical chemistry was clearly better in the U.S. ↗