Yes, much more severe. Covid alone had a higher fatality rate than Spanish flu. 2012 MERS had a 30% fatality rate. Ebola strains in Zaire and Sudan have had fatality rates over 50%.
As for those other diseases there is zero evidence that climate change has made them more severe. It's not impossible but we simply have no reliable evidence of a causal relationship one way or the other.
https://doi.org/10.1016/j.envres.2022.114655
As for those other diseases there is zero evidence that climate change has made them more severe. It's not impossible but we simply have no reliable evidence of a causal relationship one way or the other.