"Cite your sources or speak from firsthand experience" is a standard I have long been accustomed to in certain online forums. Since I do not know anyone who has gotten well like I have after being so very sick, I frequently speak from first hand experience. I am well aware that my experience flies in the face of what most people understand to be true. In some circles, my experience as someone who has had steady forward progress for 10 years straight is viewed as a credential. I am well aware not everyone views it that way.

Cultural practices:

In Africa, for I believe ebola (see the book "The Hot Zone"), tribal elders barricaded the roads into and out of the area, told their people "do not go to the white man's hospital (because you would go with a broken leg and die of infection) and quarantined sick people to their huts. They would leave food outside the door. If the food stayed there too many days, they burned the hut to the ground without going in to check if anyone was still alive. This finally contained the problem when modern/western/conventional medicine was failing to do so.

Historically in the US, it was common practice to contain the spread of venereal disease by getting the names of all your prior sexual contacts and contacting them to make sure they got treatment if necessary. This went out of fashion with the advent of AIDS, probably because it was in America primarily a disease of gays and IV drug users who had good reason to not want to give up those names. My understanding is this is part of what fueled the search for a vaccine for AIDS.

During the plague in Europe, flea markets were born of a desire to keep traveling sales people and their fleas out of the city to try to prevent the spread of the plague. Farmers would leave their goods by the side of the road and leave a dish filled with vinegar. Buyers would take food and leave coins in the vinegar, to try to kill the infection so the farmers wouldn't catch it.

Cooking is so widespread it is not really viewed as specifically intended to prevent the spread of disease. But undercooked or raw meat is well known to spread infection. Similarly, monogamy is a very widespread cultural value, in part because it helps reduce the spread of disease.

The name "malaria" basically means "bad air". They did not know what caused it but did understand that you got it from visiting the swamps. One practice was to live in the mountains to try to not be exposed to "bad air". Since mosquitoes don't typically go up to higher altitudes, this was somewhat effective in protecting people.

A "gin and tonic" was developed as a means to protect against malaria. Europeans who were living in Africa would drink a gin and tonic nightly in hopes of killing the infection before it was too developed to effectively treat. Similarly, in Europe during the middle ages, it was standard practice to drink alcohol with dinner instead of water because the well water was usually not safe to drink. It was too filled with bacteria.

There are many ways in which cultures prevent the spread of disease using cultural or lifestyle practices in place of drugs and vaccines. Diseases like AIDS have proven so far to be much harder to treat than to avoid getting by just not engaging in certain practices.

As for goalposts, sorry, but my mental model is different from yours. For example, I believe cancer is most likely viral and is thus infectious, though it doesn't spread rapidly like a cold. Human papilloma virus is known to cause cervical cancer and this is why women get annual pap smears -- to test for it. Women who have had more than X number of partners (IIRC, 20 partners) are at increased risk of getting cervical cancer because it is caused by a virus which is hard to catch but is apparently sexually transmissible. Warts and cold sores are also caused by virii and cause "growths" on the body, similar to the way cancer causes tumors. Mulloskum (sp?) is a viral infection which causes growths on the skin similar to skin tags. These growths are described in the literature as "benign tumors".

Diet, certain herbs and supplements, and an eye towards body chemistry can prevent viral infection and/or effectively treat it, something modern medicine generally does a poor job of. So, yes, I believe these things can be not only as effective but more effective than vaccines, antibiotics and other modern drugs.