No, Pioneer, black people were not healthier 75 years ago than they are today. Check the life expectancy of black folks 75 years ago. And before then, there was a high mortality rate among poorer children with many doing good to make it to their 10th birthday, dying at birth, or succumbing to such diseases as diphtheria, and typhoid fever. They also suffered from rickets and whooping cough and other debilitating childhood diseases such measles and mumps. Mothers frequently died in childbirth from such things as child bed fever.Tuberculosis also impaired the health of or eventually killed off a lot of black people Later, vaccinations wiped out all of these diseases as well as small pox and polio. Better medicine also dramatically lowered the death rate from TB. Now, as Troy noted, these diseases are making a come back, thanks to the anti-vaccine community, many members of which have been influenced by celebrity parents of autistic children, looking for an excuse to blame for their less than perfect children.
My generation was vaccinated with the DPT serum that eradicated Diphtheria, Typhoid Fever, and Pertussis(whooping cough) and we were also vaccinated against small pox. Anybody my age, still has their vaccination scar on their upper left arm. We were routinely given these shots in school in the lower grades. It may have been different in the south, however.
There are risks and side effects associated with any medication including preventive vaccines but the odds are overwhelmingly in favor of the benefits out weighing the risks.
A lot of things have contributed to the degeneration of the species, including television and the computerization technology that spawned smart phones, video games and the Internet. I would add that food additives and crop spraying may also be culprits. As for vaccines, I go with erring on the side of caution.