Perhaps you're misinformed. Some leftists, including some Hollywood idiots may spew certain anti-vax claims, but the left is generally against vaccine choice and promotes misinformation and propaganda as part of the big pharma racket. If liberals, leftists, and democrats were so anti-vax, how would you account for the fact that democrat-run states like New York ended religious exemption to vaccination? Also, anti-vaxxers in general aren't trying to kill their children, they just want all the information regarding vaccine safety reported rather than biased medical lies perpetrated by the pharmaceutical industry. Many parents that choose not to vaccinate are the ones that most care about their children, not the other way around. For starters, read this NCBI report: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3404712/