Governments really need to start getting their shit together and stop blaming each other for their own mishandling (this will never happen I know). There is no point in trying to blame each other or cook up new regulations (enforcing regulation, particularly international regulation is just never going to happen). Quite frankly,most governments should seriously start considering how they will defend their citizens against biological threats. This means governments should do the following:
1. Build vaccine manufacturing capabilities. These are as important as other aspects of physical armed force defense. Every country should try to have their own facility given how vaccine supplies are being weaponised by certain powers.
2. Build up hospital capacity and make healthcare affordable. Train more doctors and nurses. In particular nurses are very important and generally require less training, so I would focus on building up a reserve of nurses. Pandemics will only get worse with our aging population. Our beds:human ratio is terrible even in the most advanced countries.
3. Invest in R&D towards breakthrough technologies in testing. There are currently tests like Breathonix's breathe based test that can detect a covid infection in 2 minutes with pretty decent sensitivity.
4. Build a medical reserves corps. This would be a group of citizens who voluntarily are trained in basic first aid.
5. Build more oxygen plants/equip hospitals and ambulances with oxygen concentrators.
6. Conduct drills like the Army does that simulate such an emergency. Practice emergency buying. Keep your medical corps on their toes.
7. Make sure every god damn citizen has a bank account so you can transfer emergency funds into the account in the event of a major economic disruption.
8. Estimate the financial impact and provide backup options for people who work in the service industry. If you were an air hostess for instance, you would have some basic training in medical emergency handling. In the event of a pandemic, your income source will be hurt. However, the government would definitely be scrambling for nurses and contact tracers. These are jobs that could be taken up temporarily during the duration of the pandemic.
9. Work on technolgies and training for deployment of field hospitals.
None of these actions should change irregardless of whether the vaccine is a lab leak or not a lab leak.