Without modern medicine, our lives would be vastly different. Without the broad vaccination programs we have in place pesky little diseases like TB, Polio, (remember smallpox?), etc. would come back happily out of the woodwork and once again reduce our ballooning populations nicely.
Without cardiac intervention, many Western men and others around the globe would be dropping dead at 50-60 instead of 70-80+.
Same scenario for cancer, worse probably.
Viral outbreaks and epidemics would change how we live in terms of defending our families against the spread of the disease. With no way to check the spread, people would have to run from hot zones. This would likely create a scenario akin to several bad B-horror movies I can think of.
Infant birth mortality would increase, as would mortality rates for young pregnant women. Even with modern medicine and surgery, birth complications are still common. We've forgotten some of that in the face of modern C-sections and epidurals. Reversion to essentially paegan medicine would remind us nicely.
Those nasty peanut and other food allergies would probably take a back seat though, as unchecked anaphylactic shock would wipe out those affected.
Getting old wouldn't be so much of a drag as we'd all die sooner from the little things - pneumonia, infections, gangrene from brittle broken bones that haven't been set properly due to lack of x-ray/imaging technology, etc.
I won't even get into antibiotics as they really should speak for themselves.
Hmmm...maybe I'll stop here, I'm depressing myself. No meds for that either, come to think of it...
