Mother and nurse Meggy Doodle believes the "big pharma" theory that anti-vaccination people like to quote misses one big, fundamental point.
The California woman has gone viral with a Facebook post in which she debunks a popular argument among anti-vaxxers.
The woman took to Facebook to explain why she is tired of people thinking vaccines are just part of some big plot by "Big Pharma".
"I had a major epiphany today. Some of you aren't going to like this, but it's flu season so here we go..." she writes on Facebook.
"I think that people who don't want to vaccinate should have the freedom to do so.
If they think that 'Big pharma' is just trying to turn a profit or poison us all ...they should be allowed to believe that.
However, she says, there is one big caveat:
"Then they should NOT go to the doctor or the hospital when they get sick, looking for treatment.
"That's right. And here's why: Big pharma makes those antibiotics we are going to pump you full of when you are about to die from sepsis. The steroids and epi we might give you to save your life from your anaphylaxis? Yep, big pharma is behind that too.
"That inhaler you need to treat your kid's asthma? Better pass on that as well, because ... you guessed it ... brought to you by Big P.
"Having a heart attack? Better break out your essential oils and get your affairs in order, because the only thing we have to offer you is medicine and procedures brought to you by the very same people who are responsible for those vaccines you insist are evil," she continues.
"Having a massive stroke? Can't talk or move half your body? Well no TPA for you. Even though it could potentially reverse every symptom of your stroke in minutes ... Because big pharma is making a killing on that stuff ... I think it's like $25k a pop.
"And when you get diagnosed with stage 4 cancer, don't even think about chemo ...
Code Blue?? Don't expect us to crack open the crash cart! It's just stocked full of meds we need to get your heart beating again. Where do you think they come from?
I think you get the picture."
She goes on to tell people to "stop being so naive".
"Everything has risks. Everything has side effects. Medicine is not perfect. We advocate for vaccinating your children and yourself because science has PROVEN it's the most effective method of controlling the spread of disease and giving you and everyone around you the best chance of NOT DYING from something preventable.
"Believe me when I say that not vaccinating yourself or your children because you believe that big pharma only cares about profit or that the scientific medical community has been duped, is 100 per cent insanity.
She also added that, as a nurse and a member of the medical community, she "personally" takes offence to "anyone who implies that medical professionals, like myself, would ever administer anything to anyone, especially a child, that would intentionally harm them".
"I take even more offence to anyone that would imply that a college-educated professional, like myself, is incapable of 'doing the research'. People always fire back with something like, "well if you are vaccinated, why do you care that I'm not? If you are so sure your vaccines work, It's not like you can catch it. You are 100 per cent right. I will probably be just fine. It's my newborn baby who is too young to be vaccinated that I'm worried about, it's my friend who is going through chemo, it's a neighbour that is immune compromised, it's my cousin who is allergic and can't receive the vaccine. Yes, we tell you to get vaccinated to protect yourself, but it's so much bigger than that."
"Vaccinate. Because it's not just about YOU," she concludes.
Her post has been shared more than 18,000 times since it was first published on October 24 and has sparked intense debate between those in favour and those against vaccines.