There is an institute of virology in Wuhan, but it is most likely that Covid-19 spread naturally from bats to humans.

• Bat coronaviruses are common in the South China - Thailand - Myanmar region, and viruses jump host species all the time.

• Labs that handle human pathogens are maintained under very high security. The one in Wuhan is BSL4, the highest security rating, and had prior experience handling coronaviruses. Also, the viruses themselves would be marked with radioactive isotopes. Even if they somehow got out of the building, it would be possible to find and quarantine all those exposed to it.

• If it was released on purpose, then we can narrow the list of suspects down to the countries that can reliably make bioweapons and antidotes with close to 100% certainty. That's the US, China and maybe Russia. The US and Russia were among the worst affected, and China wouldn't have released the virus in China.

So the most likely explanation is that it is a bat virus that jumped hosts.