Friends, the nations are so self-centered they don't even know what's in their own advantage. Consider what happened at COP26. The rich nations gave a paltry amount to poor nations to mitigate climate change, and this will hurt those rich nations in the end.
The same is happening with regard to the pandemic. Consider that it is estimated that today Sub-Saharan Africa is 6% fully vaccinated, and 9% partly vaccinated. The longer the whole world is not vaccinated the more time that variants can emerge. They are not vaccinated because of self-centered nationalism by the rich nations who don't contribute enough.
What do we do about this? Obviously we can't transform into altruistic nations overnight. In the meantime, as this thread says, the problem is growing. Climate change is getting worse, costing the world more each year. Pandemics are getting more frequent, because we are encroaching on animals habits. I follow Crisis Group, and every month this year conflict is getting worse. I also follow Freedom House, and according to them freedom has lessened every year for the last 15 years.
What has to happen is these nations will have to learn the hard way, that the good of the part is the good of the whole.