China’s coronavirus vaccine shows military’s growing role in medical research

[Emily]

https://www.nature.com/articles/d41586-020-02523-x

NEWS11 September 2020
China’s coronavirus vaccine shows military’s growing role in medical research
Scientists in the People’s Liberation Army helped to develop the world’s first COVID-19 vaccine to be approved for restricted use.
..........
Other militaries, including the United States, work on vaccines and conduct medical research. But the sheer size of the PLA and the speed at which reforms are taking place make its scientific transformation noteworthy, and for some, a cause for concern, especially given the growing political tensions between the United States and China, he says.

In the past few months, US security officials revealed that China has tried to spy on and steal information from US pharmaceutical companies and university research groups working on coronavirus vaccines. Scientists have also raised concerns about the ethics of approving a vaccine that is still being trialled for use in the military...

I don't think we are at this point now, but the way a virus like SARS2 (or influenza) could be used as a bioweapon is this: you release a new pandemic virus that spreads fast, kills at a high enough rate to scare people, but not enough to threaten your own country. Best if it does not really affect the young and healthy.

When the target countries roll out their pandemic vaccines, you release the second virus or viruses that clash with the immunity of those vaccines. The goal wouldn't be to create massive death and disability, just a loss of confidence in the target's political system(s).