Flesh Eating Bacteria | If You Get Invited To A Chickenpox Party, Decline


COLD SPRING, N.Y. – A few weeks ago, I stumbled across the Facebook group “Chickenpox Parties – New York Metro Area.” It has 143 members, all of whom, I’m guessing, are parents who have chosen not to vaccinate their kids against chickenpox and instead hope to build their kids’ immunity the old-fashioned way, by directly exposing them to the germs of a pox-infected child. They are not alone: Facebook has 14 other chickenpox party groups organized by geographical region, and if you can’t get to one in person, you can always ask to be sent a lollipop with an infected child’s spit on it.

Perhaps these parents go this route because they’re distrustful of the vaccine or they think that inoculating against chickenpox is dumb. For those of us who endured chickenpox as kids and emerged relatively unscathed, the varicella vaccine, as it’s called, does at first seem kind of dumb – another unnecessary medical intervention being thrust upon us and another box to check off on the never-ending paperwork that is raising a child. So should we say no to our pediatricians and bring a pox on all our houses instead?

After evaluating the medical evidence, my answer is an emphatic no. The shot is by far the better way to go. That’s because although we might recall chickenpox as a small but annoying blip on our childhood radar, it can be dangerous. True, before the vaccine was licensed in 1995, only about 100 to 150 American kids died of chickenpox every year, and most of these children had underlying immune system issues. But every year, chickenpox landed about 11,000 kids in the hospital. It’s not that they couldn’t handle all the itching; one study from Europe (where many countries do not vaccinate against chickenpox) has found that one-fifth of all otherwise healthy kids who are hospitalized for chickenpox suffer neurological problems such as strokes, meningitis, convulsions and encephalitis. Chickenpox can also cause septic shock, pneumonia, necrotizing fasciitis (that’s flesh-eating bacteria), and other bacterial infections.


All in all, before the vaccine was available, about one in 400 kids who caught the chickenpox ended up in the hospital. (For comparison, your child also has a one in 400 chance of developing diabetes.) But the vaccine prevents these complications. According to one University of Michigan study, after the varicella vaccine was licensed, hospitalizations related to the infection dropped by 75 percent within six years. Clinical trials suggest that after kids receive the first dose of the varicella vaccine between the ages of 12 and 15 months, they are between 80 and 94 percent less likely to catch the infection compared with unvaccinated children (the range I’ve provided here is large because it reflects findings from studies conducted in different ways). After receiving the second dose between ages 4 and 6, kids are 98 percent protected. And even when vaccinated kids do get sick, their bouts are usually very mild because the vaccine still helps them fight the infection more effectively. (Kids are more likely to suffer these “breakthrough” infections if they have asthma or if they receive the MMR vaccine within 28 days of the varicella vaccine.)

There’s also evidence to suggest that the vaccine staves off shingles. Chickenpox is a herpes virus, which, like the kind that affects your lips and nether regions, sits latent inside your cells after an initial infection until something causes it to flare up again. Seniors are at a high risk for suffering these chickenpox-related flare-ups, called shingles, which can cause terrible, long-lasting pain. (About half of all 85-year-olds have had it.) Kids and adolescents can get shingles too, though it’s rare. And a 14-year-long study found that kids vaccinated against varicella were 39 percent less likely to get shingles as youth than were unvaccinated kids who had naturally caught the infection. No one yet knows, however, whether this extra shingles protection will last until old age because the chickenpox vaccine hasn’t been around long enough – its earliest recipients are still pretty young.

Does the vaccine pose risks, too? Of course; every medical intervention does. But the risks associated with the vaccine are much lower than the risks associated with infection. The Centers for Disease Control and Prevention and the Food and Drug Administration monitor potential vaccine side effects using the Vaccine Adverse Event Reporting System. VAERS isn’t perfect. For one thing, it doesn’t record problems unless patients or their doctors report them. The complaints about the varicella vaccine that get recorded in VAERS aren’t always caused by the varicella vaccine, either. For instance, if a person falls ill soon after getting the shot, it’s possible that the timing is simply a coincidence – maybe the child was catching the flu anyway. Moreover, about half of VAERS complaints about the varicella vaccine describe problems people experience


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