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Immunization: Diphtheria, tetanus, acellular pertussis (dTap) vaccine


Diphtheria, tetanus, acellular pertussis (dTap) vaccine

Immunization protects you from disease.

Get protected, get immunized.

  • Vaccines make your immune system stronger. They build antibodies to help prevent diseases.
  • Immunization is safe. It’s much safer to get immunized than to get these diseases.

What is the dTap vaccine?

This vaccine gets its name from the diseases it protects against: diphtheria, tetanus, and pertussis (whooping cough).

Who should get the dTap vaccine?

Grade 9 students get the dTap vaccine in school. Younger children may also get this vaccine if they are at least age 7 years and:

  • they're not up to date with their diphtheria, tetanus and pertussis immunizations
  • they cut or poke themselves with something dirty

If you’re an adult, you should have this vaccine if:

  • you’ve never been immunized for diphtheria, tetanus, and pertussis
  • it’s been 10 years since your last dose
  • you’re pregnant (even if it’s been less than 10 years since your last dose)

In Alberta, a dTap vaccine is recommended in every pregnancy. It’ll help protect your baby during their first few months of life, especially against pertussis. It is best if you get the dTap vaccine when you are between 27 and 32 weeks pregnant. If you’re outside of this time, talk to your healthcare provider as you may also get it earlier or later in your pregnancy.

How many doses do I need?

If you had your routine immunizations on schedule, you need an extra dose (booster) of dTap:

  • in Grade 9 (If your child already had a dose when they were at least age 12 years, they do not need a dose in Grade 9.)
  • every 10 years as an adult
  • during each pregnancy

If you’re getting immunized for diphtheria, tetanus and pertussis for the first time, you need 3 doses.

How well does the vaccine work?

If you’re healthy and get all of the recommended doses, the protection is:

  • almost 100% for diphtheria and tetanus
  • around 90% for pertussis

It’s important to get booster doses because the protection may weaken over time.

Where can I get the dTap vaccine?

Grade 9 students can get the vaccine in school. Parents and guardians will get information about tetanus, diphtheria, and pertussis and the vaccine. If you want your child to get the vaccine in school, you must fill out the consent form and return it to the school.

Children can also get the dTap vaccine at a public health office.

Adults can get the dTap vaccine at a public health office. If you’re pregnant, you can get the dTap vaccine at a public health office or pharmacy.

If you’re pregnant, you can also get the dTap vaccine at a pharmacy.

If you’re at risk for tetanus after an injury or wound, you may also get the dTap vaccine at an urgent care centre, emergency department, doctor’s office, or walk-in clinic.

Are there side effects from the dTap vaccine?

There can be side effects from the dTap vaccine, but they tend to be mild and go away in a few days. Side effects may include:

  • redness, swelling, or feeling sore where you had the needle
  • feeling tired or getting upset easily
  • headache
  • dizziness
  • a fever or chills
  • body aches or sore joints
  • not feeling hungry or not wanting to eat (poor appetite)
  • feeling sick to your stomach (nausea), vomiting (throwing up), or loose stool (diarrhea)
  • a rash
  • swollen lymph nodes

It’s important to stay at the clinic for 15 minutes after your vaccine. Some people may have a rare but serious allergic reaction called anaphylaxis. If anaphylaxis happens, you will get medicine to treat the symptoms.

It’s rare to have a serious side effect after a vaccine. Call Health Link at 811 to report any serious or unusual side effects.

How can I manage side effects?

  • To help with soreness and swelling, put a cool, wet cloth over the area where you had the needle.
  • There is medicine to help with a fever or pain. Check with your doctor or pharmacist if you’re not sure what medicine or dose to take. Follow the directions on the package.
  • Children under the age of 18 years should not take aspirin because it can cause serious health problems.
  • Some people with health problems, such as a weak immune system, must call their doctor if they get a fever. If you’ve been told to do this, call your doctor even if you think the fever is from the vaccine.

Who should not get the dTap vaccine?

You may not be able get this vaccine if you:

  • have an allergy to any part of the vaccine
  • had a severe (serious) or unusual side effect after this vaccine or one like it

You can still get the vaccine if you have a mild illness, such as a cold or fever. Always tell your healthcare provider if you have allergies or if you have had a side effect from a vaccine in the past.

Check with your doctor or public health nurse before you get the vaccine.

Facts about diphtheria, tetanus, and pertussis

What is diphtheria?

Diphtheria is a nose and throat infection caused by bacteria. It’s spread by coughing, sneezing, or close contact with an infected person. It can cause trouble breathing or swallowing, heart failure, and paralysis (not being able to move a part of your body).

One out of 10 people who get diphtheria will die.

What is tetanus?

Tetanus is a bacterial infection that causes uncontrolled movements (spasms) in the muscles of the jaw and other muscles of the body. Tetanus bacteria are common in dirt, manure (animal stool), and human stool. They can get into the body through a cut on the skin or an animal bite.

Tetanus can cause:

  • a condition called lock jaw where the mouth stays closed and can’t open widely
  • trouble breathing, seizures, and death

Getting tetanus is rare because there has been a vaccine since the 1940s. Most people have been immunized against it.

Go to the tetanus page on to find out more.

What is pertussis?

Pertussis is an infection of the airways caused by bacteria. Its spread by coughing, sneezing, or contact with an infected person. Pertussis can cause:

  • coughing spells that can last for months
  • a hard time eating, drinking, and breathing (especially for babies)
  • pneumonia (a type of lung infection)

In rare cases pertussis can lead to seizures, brain injury, and death.

Go to the pertussis page on to find out more.

More information

To see this information online and learn more, visit

For 24/7 nurse advice and general health information call Health Link at 811.

Current as of: Sept 1, 2021

Author: Provincial Immunization Program, Alberta Health Services

This material is not a substitute for the advice of a qualified health professional. This material is intended for general information only and is provided on an "as is", "where is" basis. Although reasonable efforts were made to confirm the accuracy of the information, Alberta Health Services does not make any representation or warranty, express, implied or statutory, as to the accuracy, reliability, completeness, applicability or fitness for a particular purpose of such information. Alberta Health Services expressly disclaims all liability for the use of these materials, and for any claims, actions, demands or suits arising from such use.