Why is it that pathogens are becoming an increasing problem since 2019?

Does anyone else find it strange how since 2019 (COVID) there seems to be an uptick in H5N1 (Avian Influenza) and now Hantavirus? I know SARS became a thing in 2002 but then it disappeared and never became a pandemic like COVID did. The first human case of Hantavirus was in 1993. The first human case of Avian Influenza was in 1997 then returning again in 2024. It just seems like every few years now there's a pathogen of concern when it used to be every few decades. I remember when Swine Flu (H1N1) happened in 2009. That was last pandemic I remember before COVID happened. Is it overpopulation or climate change giving animals a better chance at making pathogens jump from animals to humans causing a zoonotic spillover? What do you guys think? submitted by /u/mainlytee to r/hantavirus [link] [comments]