Crisis Versus Crisis?

It has been suggested that, if rich nations don't help their poorer counterparts with Covid19 vaccinations, the latter won't (can't?) sign up to the changes needed to prevent catastrophic climate change (https://www.theguardian.com/society/2021/jun/05/share-vaccines-or-climate-deal-will-fail-rich-countries-are-told). I greatly favour rich nations handing out vaccines as quickly as possible. Until most of the world is vaccinated, we will all be at risk from new arising variants. Care has to be taken, however, that vaccine is not wasted by vaccine hesitancy and by donating shots near their expiry dates (this makes encouraging uptake harder). Failure to counter climate change will also damage us all. Again, poorer nations are likely to be hit particularly hard by its consequences. It's a bit sad when we have to trade help for one crisis by providing assistance for another. We are all essentially on the same space ship.