Tag: pertussis

Making a Better Pertussis Vaccine

So we know that we need a better pertussis vaccine.

DTaP and Tdap just aren’t doing the job that they should be doing.

Whooping Cough is back, again.
Whooping Cough is back, again.

So when will we get one?

Making a Better Pertussis Vaccine

Since anti-vaccine folks are always talking about the 300 new vaccines in the pipeline, you would think that we would have had several new pertussis vaccines by now…

Unfortunately, we don’t.

What we do have is some good candidates, including:

  • new acellular pertussis vaccines, either with more antigens or an adjuvant
  • a new live attenuated nasal vaccine, BPZE1
  • new whole-cell vaccines with reduced endotoxin contents (so should have fewer side effects that then original whole-cell pertussis vaccine – DTP)

Before you get too excited, keep in mind that none of these vaccines will be available in your pediatrician’s office any time soon. Developing a new vaccine takes a lot of time.

BPZE1 has started phase 2a trials though.

What do we do until we get new pertussis vaccines?

“We should be more vigilant than we have been in the past to recognize and treat pertussis in all age groups so that transmission to young infants is reduced. Most important (although not discussed in this review) is to ensure that all pregnant women receive the Tdap vaccine between 27 and 36 weeks’ gestation with each pregnancy. Also, we should consider routinely administering Tdap vaccine every 3 years to all adolescents and adults who were primed with a DTaP vaccine.”

James D. Cherry on The 112-Year Odyssey of Pertussis and Pertussis Vaccines—Mistakes Made and Implications for the Future

We should keep using the pertussis vaccines we have!

Vaccines work, even when they aren’t as effective as we would like.

More on Making a Better Pertussis Vaccine

About Those Lawsuits That Almost Put Vaccine Manufacturers out of Business

So you likely know that there were a bunch of lawsuits against manufacturers of the DPT vaccine in the early and mid 1980s.

“As the number of lawsuits grew to hundreds during the early 1980s, the pharmaceutical companies making vaccines saw their liability insurance bills soar. Worried not only about multimillion-dollar settlements, but also even the legal costs of defending themselves successfully, several companies simply stopped making vaccine.”

How a Media Scare On Vaccine Started a ‘near-Epidemic’

That’s why the National Vaccine Injury Compensation Act passed in 1986, creating the National Vaccine Injury Compensation Program and the Vaccine Court.

About Those Lawsuits That Almost Put Vaccine Manufacturers out of Business

But did those DPT vaccine lawsuits prove that vaccines aren’t safe?

Is that why vaccine manufacturers needed help to limit their liability?

“The total amount claimed in 1984 DTP vaccine suits ($1.3 billion) is more than 20 times the total value of 1984 sales of DTP vaccine at the market price of $2.80 per dose.”

Hinman on DTP Vaccine Litigation

Of course not!

While the older DPT vaccine did cause more local reactions, pain, and fever than the newer DTaP vaccine that replaced it, all of the serious reactions that triggered the lawsuits were later found to not be caused by the vaccine.

Most of the DPT lawsuits were thought to be frivolous.

That’s not surprising, as the same vaccine lawsuits that were succeeding in driving vaccine manufacturers out of business in the United States were failing in the UK and Canada!

This included the Loveday judgment in Great Britain’s High Court of Justice, Queen’s Bench Division and the Rothwell judgment in the Supreme Court of Ontario, Canada, both decided in 1988, with justices ruling that there was “insufficient evidence to demonstrate that pertussis vaccine can cause permanent brain damage in children.”

Similar cases were succeeding in the US though..

“The number (and dollar value) of suits increased in 1982, a year when broadcast and print media began to devote considerable attention to the alleged hazards associated with the use of pertussis-containing vaccines. Most of the media coverage has emphasized alleged risks of pertussis vaccines and has given relatively little attention to the benefits of their use.”

Hinman on DTP Vaccine Litigation

Most experts knew that most of the lawsuits were frivolous, but they weren’t able to stop the damage that was to come, as:

  • the DPT: Vaccine Roulette special aired on TV
  • Barbara Loe Fisher, believing that her child was damaged by the DPT vaccine, formed the Dissatisfied Parents Together organization and wrote the book DPT: A Shot in the Dark, which later influenced Bob Sears
  • there were temporary shortages of DTP vaccine in 1984, as “two of the three American manufacturers of the product decided to halt or restrict its sales.”

What else happened? I mean besides all of the studies proving the DPT vaccine was safe?

Parents who had been scared by the DPT controversy were ready and primed when Andy Wakefield showed up and told them that they had something new to worry about – the MMR vaccine and autism.

And of course, pertussis is now returning, as more parents are scared to vaccinate their kids and the newer DTaP vaccine isn’t as effective as DPT.

More on Those Lawsuits That Almost Put Vaccine Manufacturers out of Business

Are the Tdap and DTaP Vaccines the Same Thing?

You have probably already figured out the Tdap and DTaP aren’t the same vaccine, after all, if they were, why would they have different names, right?

Are the Tdap and DTaP Vaccines the Same Thing?

I bet you don’t know the difference between the two vaccines though.

Yes, they both are both combination vaccines that protect against diphtheria, tetanus, and pertussis.

The difference is that one (DTaP) is used as the primary series for infants and younger children (age 6 years and under) and the other (Tdap) is given to older children (age 7 years and above), teens, and adults.

Okay, that’s not the only difference.

The DTaP vaccine actually contains more diphtheria and pertussis antigens than Tdap, which is why it has the capital “D” and “P” in its name. The amount of tetanus toxoid antigens are about the same in both vaccines.

So Tdap contains the same amount of tetanus toxoid, plus a reduced amount of diphtheria and acellular pertussis antigens, as compared to DTaP.

While you would think that older children and adults would get the vaccine with the higher amount of antigens, since they are bigger, that’s not how this works. Vaccines typically start working at the injection site, so body size isn’t a key factor in determining the amount of ingredients.

As a booster dose of vaccine, the lower amount of antigens works just fine and helps reduce the risk of side effects from repeated doses that you might get with higher antigen counts.

More on Tdap vs DTaP

Alternative Names for Vaccine Preventable Diseases

You know all of the names – measles, mumps, rubella, diphtheria, whooping cough, etc.

But do you know why they used to call 10-day measles?

And which disease causes a 100-day cough?

Alternative Names for Vaccine Preventable Diseases

Back in the day, when these diseases were more common, they used much more descriptive terms and nicknames, in addition to their official names.

Why was measles known as 10-day measles?

Because there was also a 3-day measles!

MeaslesRubella
10-day measles3-day measles
red measlesGerman measles
rubeola

Unfortunately, 10-day measles made you feel miserable for 10 days!

Although a vaccine was available, it took a little more time to get measles under better control.

Can you guess which disease was known to cause a 100-day cough?

That’s right, it’s whooping cough or pertussis.

“I honestly felt like it was never going to go away. The doctor told me it was 100 day cough, so I was counting the days while Googling to see if there was anything that could help. I tried everything, you name it, I tried it, and nothing worked. It came to 120 days and I couldn’t understand why it wasn’t gone. I then researched and found that babies take longer to get over whooping cough.”

Fern’s Story – Whooping Cough

Fortunately, the cough doesn’t typically last that long if you are vaccinated and still get pertussis.

What do they call rabies?

Mad dog disease.

But that’s an easy one.

Which disease was known as “the Strangling Angel?”

“The breathing became much more difficult, with a kind of rattling stertor, as if the patient was actually strangling, the voice being exceeding hoarse and hollow, exactly resembling that from venereal ulcers in the fauces. This noise, in speaking and breathing, was so peculiar, that any person in the least conversant with the disease might easily know it by this odd noise; from whence, indeed, the Spanish physicians gave it the name of garrotillo, expressing the noise such make as are strangling with a rope.”

Edward Headlam Greenhow on Diphtheria

How about “The Crippler?”

Fight Polio Poster
Polio, also known as infantile paralysis, was known as “The Crippler.”

The “Speckled Monster?”

Even mild smallpox, as depicted on this WHO Smallpox Recognition Card, included flu like symptoms, a few weeks of pustules, and then waiting for the lesions to scab over...
Even mild smallpox, as depicted on this WHO Smallpox Recognition Card, included flu like symptoms, a few weeks of pustules, and then waiting for the lesions to scab over…

We forget these names, because we don’t see these diseases anymore.

“…for those trained in pediatrics in the 1970s, Hib (Haemophilus influenzae type b) was a horror.”

Walter Orenstein

Do you remember that measles was called a “harmless killer?”

Be sure to think about how these now vaccine-preventable diseases got their nicknames before you think about skipping or delaying your child’s vaccines.

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