It's less likely, but bacteria do cause pandemics. Yersinia pestis, the most well-known example. Or Mycobacterium tuberculosis, which is still a major cause of

It's less likely, but bacteria do cause pandemics. Yersinia pestis, the most well-known example. Or Mycobacterium tuberculosis, which is still a major cause of death today. Or even parasites, such as plasmodium.