As you'd probably guess, experts pin the rise in measles to lower vaccination rates. I covered a number of vaccination and measles myths in this column months ago, but there is a new spin on measles that seems to be gaining some traction: A lot of people think contracting measles is good for your heath.
There is no evidence that measles infection can protect against cancer. Full stop. But whether measles can treat cancer is a little more complex. There is a small grain of truth here, but it's wrapped in a lot of misconceptions.
The bottom line: The wild measles virus is a dangerous pathogen, not a cancer cure. Not only that, but part of the reason the virus therapy worked so well on the patient CNN covered was because she had been vaccinated for measles, so if genetically modified measles ever end up being used as cancer treatment, it's better to have been vaccinated than not.
Does contracting measles prevent heart disease?
While being infected with the disease will likely result in being immune to measles afterwards, it harms your immune system as a whole. A 2019 study from Harvard Medical School published by Science, found that the measles virus can cause "immune amnesia," the wiping out of up to three-quarters of antibodies protecting against other infections like the flu or the bacteria that cause pneumonia. "The measles virus is like a car accident for your immune system,” Harvard University geneticist Stephen Elledge, the senior author of the Science study, told The Los Angeles Times.
Meanwhile, we have extremely strong evidence that the measles vaccine doesn't cause a general weakening of the immune system—note, for example, the dramatic reductions in childhood deaths from other diseases in places where measles immunization programs are introduced. After measles vaccinations began in the United States in the 1960s, deaths from diseases like pneumonia and diarrhea were cut by half, and in populations where infectious diseases are more common, the reduction in mortality has been up to 80 percent.
Playing devil's advocate on measles
Measles is a serious disease. Regardless of any future benefit, contracting measles is deadly in up to three of every 1,000 cases. About one child out of every 1,000 who get measles will develop encephalitis (swelling of the brain) that can lead to convulsions, hearing loss, and intellectual disability.
Vaccination for measles, on the other hand, is very safe. The most serious side effects come from severe allergic reactions, and that happens about in a one in a million doses. The measles vaccine generates immunity without the risk of encephalitis, without immune amnesia, and without gambling a child’s life on a hypothetical future payoff. If measles exposure truly primes the immune system in some beneficial way, vaccination captures the immune response while stripping out the damage. No matter how generous you are to the "infection is good" argument, infection is a dangerous and inefficient way to get there.
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