A lot of the science is already in on this. The most effective interventions are hygiene (washing hands), masks, social distancing and contact tracing (and quarantining close contacts). This is low tech stuff, which is one of the reasons many poor countries have been able to do very well at controlling the pandemic.

Apparently the #1 predictive factor for a country to have good health outcomes is trust between the citizens and their government. Small countries have done better than big countries, but that may be a side effect of public trust generally being better in smaller countries.

Source: this podcast (based on a study) https://overcast.fm/+YQ31Gx6tw