Hepatitis B virus causes cancer – yes, the vaccine can prevent it

hepatitis b virus

A recent study provides more evidence that the hepatitis B virus (HBV) is linked to a variety of cancers – that’s not surprising to most of us. We also know that the HBV vaccine can prevent the infection, thereby preventing a wide range of cancers. 

Despite the facts supporting the dangers of the hepatitis B virus, the anti-vaccine zealots absolutely despise the vaccine, especially since it’s usually given to newborns (with a second dose recommended at 1-2 months along with a third dose at about 12-18 months) to prevent HBV infections passed from the mother.

Let’s take a look at the hepatitis B virus and this new peer-reviewed paper that discusses the link between HBV and a number of cancers. Continue reading “Hepatitis B virus causes cancer – yes, the vaccine can prevent it”

BCG vaccine is priced too low – now, shortage for bladder cancer

bcg vaccine

You probably don’t know much about the BCG vaccine, because it isn’t used much these days. And no, it’s not one of the vaccines on the CDC immunization schedule for either adults or children. 

The Bacillus Calmette-Guerin vaccine, or BCG vaccine, was initially developed to prevent tuberculosis. The disease is caused by bacteria called Mycobacterium tuberculosis. The bacteria usually attack the lungs, but they can also damage other parts of the body. Tuberculosis is treatable with advanced medicines, but it takes a long time and can be expensive. Without treatment, the patient will die.

So, why does it matter that the BCG vaccine is priced too low or that we have a shortage of it? Well, it has a couple of important uses (one current, and one potential) that has driven demand for the vaccine. And it’s not because there’s a sudden worldwide epidemic of tuberculosis. Continue reading “BCG vaccine is priced too low – now, shortage for bladder cancer”

Gardasil facts – debunking myths about HPV vaccine safety and efficacy

Gardasil safety and efficacy

The HPV cancer-preventing vaccine, especially Gardasil (or Silgard, depending on market), has been targeted by the anti-vaccine religion more than just about any other vaccine being used these days. So many people tell me that they give their children all the vaccines, but refuse to give them the HPV vaccine based on rumor and innuendo on the internet. This article provides all the posts I’ve written about Gardasil safety and efficacy.

As many regular readers know, I focus on just a few topics in medicine, with my two favorites being vaccines and cancer – of course, the Gardasil cancer-preventing vaccine combines my two favorite topics. Here’s one thing that has become clear to me – there are no magical cancer prevention schemes. You are not going to prevent any of the 200 different cancers by drinking a banana-kale-quinoa smoothie every day. The best ways to prevent cancer are to quit smoking, stay out of the sun, keep active and thin, get your cancer-preventing vaccines, and following just a few more recommendations.

The benefits of the vaccine are often overlooked as a result of two possible factors – first, there’s a disconnect between personal activities today and cancer that could be diagnosed 20-30 years from now; and second, people think that there are significant dangers from the vaccine which are promulgated by the anti-vaccine religion.

It’s frustrating and difficult to explain Gardasil safety and efficacy as a result of the myths about safety and long-term efficacy of the vaccine. That’s why I have written nearly 200 articles about Gardasil safety and efficacy, along with debunking some ridiculous myths about the cancer-preventing vaccine. This article serves to be a quick source with links to most of those 200 articles.

And if you read nothing else in this review of Gardasil, read the section entitled “Gardasil safety and effectiveness – a quick primer” – that will link you to two quick to read articles that summarize the best evidence in support of the vaccine’s safety and effectiveness.

Continue reading “Gardasil facts – debunking myths about HPV vaccine safety and efficacy”

HPV vaccine facts – refuting RFK Jr’s false and unscientific claims – Part 2

HPV vaccine facts

Recently,  I wrote a post about Robert F Kennedy Jr’s 25 false claims that stood against HPV vaccine facts and science – because that’s what the anti-vaccine crowd does well. 

As I mentioned, he has recently become a loudmouth anti-vaccine acolyte, who has been chastised by his own family for helping “to spread dangerous misinformation over social media and is complicit in sowing distrust of the science behind vaccines.”

Because there were 25 lies in RFK Jr’s article, I just covered the first 12 in a previous post. Now I will take on the remaining 13 by reiterating HPV vaccine facts. Continue reading “HPV vaccine facts – refuting RFK Jr’s false and unscientific claims – Part 2”

Bananas prevent cancer – debunking another myth about food

bananas prevent cancer

I wrote this article over five years, debunking the claim that bananas prevent cancer, and it remains the most popular article I’ve ever written. It probably gets so much traffic because of the ongoing memes about how bananas will cure every cancer known to man. 

Too many individuals see these memes on Twitter and Facebook, then they accept them as scientific facts. They rarely are. That’s why critical thinking is necessary. 

But if a meme is going to make an extraordinary claim, like bananas prevent cancer, then that claim ought to be backed by extraordinary evidence. But this wild belief about bananas is not even supported by ordinary evidence. It is supported by zero evidence.

Continue reading “Bananas prevent cancer – debunking another myth about food”

Testing vaccines for cancer – another anti-vaxxer myth with no credibility

testing vaccines

If you’re spending more than a nanosecond reading idiotic memes from the anti-vaccine religion, I’m sure you’d see the old the package insert says that FDA doesn’t require testing vaccines to determine whether they cause cancer or not. It still makes me laugh how much authority the anti-vaxxers give to package inserts, but that’s another story for another day.

Oh wait, it is another story that I told. You know, the old argument by vaccine package insert fallacy. It’s a fun one, it’s helpful in dismissing the bogus claims that the anti-vaxxers make using package inserts.

Like all zombie memes from the vaccine deniers, this one keeps disappearing then returning every few months. And now with the current measles epidemic in the US and other areas, it’s arisen from the graveyard of debunked vaccine myths to haunt the internet. 

And it’s time to debunk it once again. Continue reading “Testing vaccines for cancer – another anti-vaxxer myth with no credibility”

HPV prevalence drops by 86% since introduction of vaccine

hpv prevalence

Ten years after the introduction of the human papillomavirus (HPV) vaccine in the USA in 2006, HPV prevalence has dropped significantly in a new study from the Centers for Disease Control and Prevention (CDC). This is very encouraging research that further strengthens the evidence behind the effectiveness of the HPV vaccine.

One of the tropes pushed by the anti-vaccine religion is that we don’t know if the vaccine actually will prevent an HPV infection after 10 years. Well, now we know. 

Let’s take a look at the study on HPV prevalence in the USA. Continue reading “HPV prevalence drops by 86% since introduction of vaccine”

Correlation implies causation – when it does or does not with vaccines

correlation implies causation

I originally wrote this article in 2014 to discuss whether correlation implies causation. Not that I expect everyone to read and remember this one article, but it’s frustrating when I see a conversation where people who deny science and accept science both misuse correlation and how it relates to causation. So, I decided to update this article and republish it as a reminder that the relationship of correlation to causation isn’t as easy as a simple trope or meme.

One of the foundations of biomedical science is whether correlation implies causation. Anti-vaccine activists often conflate or misunderstand the two, rejecting or accepting correlation as it fits its narrative.  The “correlation implies causation” story is often abused, misused and confused by many writers.

One thing we do know about correlation is that if you can’t establish correlation, despite numerous attempts, it is nearly impossible to claim causation. Also, if you do observe correlation, it also doesn’t imply causation. 

But there are methods, grounded in powerful science, to establish causation from observations of correlation. So sometimes correlation does not imply causation. But sometimes correlation implies causation. 

This article will help show how we may be able to establish causation from observations of correlation. And, like all science, this is hard stuff. Continue reading “Correlation implies causation – when it does or does not with vaccines”

Doctors once said that “smoking is safe” – another anti-vaccine myth

smoking is safe

If you hang around discussions about vaccines, you will see the oft-repeated claim that doctors once claimed that “smoking is safe.” The anti-vaccine religion (or terrorists) use this trope as a strawman argument in an attempt to discredit physicians, scientists and the Centers for Disease Control and Prevention (CDC) who claim that vaccines are safe and effective.

Anti-vaxxers really lack much evidence to support their science-denying arguments against the settled science regarding the safety and effectiveness of vaccines. Thus, they have to rely upon misinformation, tropes, and lies to make arguments that vaccines are something. 

I would laugh at this “smoking is safe” claim, except it’s used to dissuade parents from trusting wonderful organizations like the CDC, which only has one goal, to protect lives from diseases. So, let’s debunk this anti-vaccine myth because that’s what we do around here. Continue reading “Doctors once said that “smoking is safe” – another anti-vaccine myth”

Glyphosate linked to non-Hodgkin lymphoma? Analysis of new study

glyphosate

A new study has been published that claims that the herbicide glyphosate is linked to an increased risk of non-Hodgkin lymphoma,  a cancer of the lymph tissue. Of course, once a study like this hits the interwebs, everyone becomes panicked that glyphosate causes cancer.

I want to take a look at this paper because I am generally distrustful of any claims that “XYZ causes cancer!!!!!!!!!!!!” 

Cancer myths are pervasive, and a lot of fear of cancer is based on those myths. So let’s take a critical eye and examine the peer-reviewed paper that claims that there is a link between glyphosate and non-Hodgkin lymphoma. There is a lot there, but there is also a lot of overreaction. Continue reading “Glyphosate linked to non-Hodgkin lymphoma? Analysis of new study”