As I'm sure you've seen on the news, the east coast has recently had a number of cases of Eastern Equine Encephalitis and today someone died. This got my thinking a bit because there's quite a few diseases my animals are routinely vaccinated for that there is no human vaccine available for.
My horse is vaccinated every spring for Eastern, Western and Venezuelan Encephalitis and West Nile. Dogs on the east coast get vaccinated for Lyme and some dogs also get vaccinated for lepto. Clearly there is the ability to make these vaccines so why is there no human equivalent? I'm sure part of it has to do with exposure and risk–an animal spends more time outside and is more likely to be exposed to some of these diseases. And I'm guessing the testing for human vaccines is a lot more vigorous than animal vaccines.
Any thought or experience? Apparently at one point there was a Lyme vaccine but fear caused it to be pulled from the market. https://www.vox.com/science-and-health/2018/5/7/17314716/lyme-disease-vaccine-history-effectiveness Not the most reputable source though.
Source: Original link