Chloe Ramirez
The Tdap vaccine, which protects against tetanus, diphtheria, and pertussis (whooping cough), was first licensed in 2005 as an improved version of the Td (tetanus and diphtheria) vaccine. While it is recommended that all adults get the Tdap vaccine, especially those who will be around young infants, children born in the late '70s would not have received this vaccine during childhood. Instead, they likely would have received the DTP vaccine, which was introduced in 1948 and combined vaccines for diphtheria (1926), tetanus (1938), and pertussis (1914).
| Characteristics | Values |
|---|---|
| Year Tdap vaccine was introduced | 2005 |
| Previous vaccine | Td |
| Tdap vaccine protection | Tetanus, diphtheria, and acellular pertussis (whooping cough) |
| Tdap vaccine dosage | One dose in childhood, then every 10 years for life |
| Tdap vaccine dosage for ages 10–18 years | Counted as the adolescent Tdap booster dose |
| Tdap vaccine dosage for ages 7–9 years | Administered Tdap should receive the adolescent Tdap booster dose at age 11–12 years |
| Tdap vaccine dosage for age 10 years | Do not need the adolescent Tdap booster dose at age 11–12 years |
| Tdap vaccine dosage for pregnancy | 1 dose during each pregnancy, preferably between weeks 27–36 |
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What You'll Learn
Tdap vaccine development history
The Tdap vaccine is a combination vaccine that protects against tetanus, diphtheria, and acellular pertussis. While vaccines against these diseases have been available since the early 20th century, the development and history of the Tdap vaccine as a single-shot immunization is relatively recent.
Early Vaccines:
Tetanus, diphtheria, and pertussis (whooping cough) vaccines were first developed and introduced in the early 20th century. The whole-cell pertussis vaccine was licensed in the US in 1914, followed by the diphtheria vaccine in 1926 and the tetanus vaccine in 1938. These vaccines were combined and given as the DTP vaccine starting in 1948, with routine use in the US in the 1940s.
Concerns and Side Effects:
While effective, the DTP vaccine had its drawbacks. Concerns arose in the 1970s due to alleged severe reactions, including encephalopathy and even death. As a result, some countries discontinued or reduced the use of the DTP vaccine. During this time, extensive research was conducted on Bordetella pertussis, and the development of less reactogenic acellular vaccines was explored.
Development of Acellular Vaccines:
The first diphtheria, tetanus, and acellular pertussis (DTaP) vaccines were developed in Japan and introduced into routine use there. In the 1990s, the Western world followed suit, developing their DTaP vaccines and conducting definitive efficacy trials. Despite being less reactogenic than the whole-cell DTP vaccines, the DTaP vaccines were approved in the US and other countries. The US replaced the DTP vaccine with the DTaP vaccine in 1997.
In 2005, the Tdap vaccine was introduced as an improved version of the tetanus booster (Td) for adolescents and adults. Two Tdap vaccines, Boostrix and Adacel, received FDA approval for individuals between the ages of 10 and 18 years, and 11 through 64 years, respectively. The CDC's Advisory Committee on Immunization Practices (ACIP) recommended that all 11- to 18-year-olds receive a dose of the Tdap vaccine, including those previously vaccinated with the Td booster. In 2006, ACIP extended this recommendation to all adults between the ages of 19 and 65. Additionally, Tdap vaccination was encouraged for women of childbearing age, preferably before or immediately after pregnancy, to prevent pertussis in infants.
While the Tdap vaccine has been successful in reducing pertussis cases, it has faced challenges in providing long-term protection. As a result, strategies such as additional doses during outbreaks and repeat vaccinations for high-risk individuals have been considered.
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Tdap vaccination recommendations
The Tdap vaccine was first licensed in 2005 as an improved version of the typical tetanus booster, Td. It contains a component to protect against pertussis (whooping cough) in addition to tetanus and diphtheria.
- Children: The CDC recommends that children receive their first dose of Tdap in childhood, followed by a booster dose every 10 years for life. Children aged 7-18 years who have not received Tdap should receive one dose as part of the catch-up series, preferably as the first dose. If a child under the age of seven has a contraindication specific to the pertussis component of Tdap, Td can be administered for the remaining recommended doses.
- Adolescents: Adolescents aged 11-12 years should receive the Tdap adolescent booster dose. Those aged 10-18 years can count the dose of DTaP as the Tdap booster.
- Pregnant Women: The CDC recommends that pregnant women receive one dose of Tdap during each pregnancy, preferably during gestational weeks 27-36. If a tetanus-toxoid-containing vaccine is indicated for a pregnant adolescent, Tdap is preferred.
- Adults: All adults, especially those who will be around young infants, should receive the Tdap vaccine. Adults often unknowingly pass pertussis to young infants, for whom the disease can be fatal. Tdap can be administered to adults regardless of the interval since the last tetanus- and diphtheria-toxoid-containing vaccine. The CDC recommends a Tdap or Td booster dose every 10 years.
It is important to follow the recommended vaccination schedule as the timing of each vaccine affects its protective ability. Schedules may vary based on individual circumstances, and a healthcare provider can advise on appropriate timing.
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Tdap vaccination schedule
The Tdap vaccine was first licensed in 2005 as an improved version of the typical tetanus booster, Td. It contains a component to protect against pertussis (whooping cough) in addition to tetanus and diphtheria.
Infants and Children Younger than 7 Years Old
The CDC recommends DTaP for all infants and children younger than 7 years old. This is because the Tdap vaccine has a higher concentration of diphtheria toxoid, which may cause side effects in younger children. If the pertussis component is contraindicated, Td can be used to complete the primary series in this age group. The recommended schedule for DTaP is a 5-dose series, with one dose administered at each of the following ages:
- 2 months
- 4 months
- 6 months
- 15-18 months
- 4-6 years
Children Aged 7-10 Years
Children in this age group who receive Tdap should receive the adolescent Tdap booster dose at 11-12 years old.
Adolescents Aged 11-18 Years
The CDC recommends a single dose of Tdap for all adolescents aged 11-12 years. Those aged 13-18 years who have not received Tdap should also receive a single dose.
Pregnant Women
The CDC recommends one dose of Tdap during each pregnancy, preferably during the early part of gestational weeks 27-36. This helps protect both the mother and newborn from pertussis, which can be fatal in infants.
Adults
All adults, especially those who will be around young infants, should receive the Tdap vaccine if they have not already done so. After receiving Tdap, adults should continue to receive Td or Tdap for routine booster immunization every 10 years.
It is important to note that Tdap can be administered regardless of the interval since the last tetanus- and diphtheria-toxoid-containing vaccine. Additionally, Tdap can be safely co-administered with other indicated vaccines, such as the COVID-19 vaccine.
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Tdap vs Td vaccine
The Tdap vaccine is an improved version of the typical tetanus booster, Td, which was licensed in 2005. The Tdap vaccine contains a component that protects against pertussis (whooping cough) in addition to tetanus and diphtheria. Whooping cough can be fatal for young infants, so it is recommended that adults, especially those who will be around newborns, get the Tdap vaccine. The CDC also recommends that pregnant women receive a dose of Tdap during pregnancy, preferably between 27 and 36 weeks of gestation.
The Td vaccine only protects against tetanus and diphtheria. Tetanus is a bacterial infection that can enter the body through dirty cuts or wounds, while diphtheria is a contagious bacterial disease that leads to a thick coating in the throat, potentially blocking breathing. Although the number of diphtheria cases has decreased by 99% since the introduction of the vaccine, it can still cause heart failure, paralysis, and even death.
The Tdap vaccine is part of the routine childhood immunization schedule and is recommended for children aged 11-12 as an adolescent booster. For children under the age of seven with a contraindication to the pertussis component of the Tdap vaccine, the Td vaccine can be administered instead for the recommended remaining doses. Babies and children under the age of 12 need six tetanus shots at specific intervals to build their immunity, after which a tetanus booster shot is needed approximately every 10 years.
While most people should get the Td vaccine, there are rare exceptions where it may not be safe. It is recommended that individuals with a history of certain medical conditions consult their healthcare provider before receiving the Td vaccine. In contrast, the Tdap vaccine is generally considered safe for people aged 11 and older, even if they have previously received the Td vaccine.
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Tdap vaccine importance
The Tdap vaccine is an important tool in protecting against three dangerous and potentially life-threatening diseases: tetanus, diphtheria, and pertussis (or whooping cough). Vaccination is the most effective way to prevent these diseases, and with the Tdap vaccine, cases of tetanus and diphtheria have dropped by about 99%, while cases of pertussis have decreased by about 80%.
Tetanus, also known as lockjaw, is a bacterial disease that affects the body's muscles and nerves. It enters the body through cuts or wounds and causes painful stiffening of the muscles, making it difficult to open the mouth or swallow and breathe, and can even lead to death. Diphtheria is a respiratory disease caused by bacteria that can lead to difficulty breathing, heart failure, paralysis, and death. Pertussis, or whooping cough, causes violent coughing that makes it hard to breathe, eat, or drink. It can be extremely serious, especially in babies and young children, leading to pneumonia, convulsions, brain damage, or death.
The Tdap vaccine was licensed in 2005 as an improved version of the typical tetanus booster (Td), which did not protect against pertussis. The Tdap vaccine is recommended for adolescents aged 11-19, adults, and pregnant people to protect themselves and their newborns. Initial Tdap immunizations should be followed by booster shots every 10 years, or after 5 years in the case of a severe or dirty wound.
While side effects from the Tdap vaccine can be uncomfortable and may include pain, redness, or swelling at the injection site, mild fever, headache, fatigue, nausea, vomiting, diarrhea, or stomachache, these are typically mild and less severe than the diseases the vaccine prevents. Severe side effects are rare but may include hives, welts, and breathing problems.
The Tdap vaccine is an important public health measure that has significantly reduced the incidence of tetanus, diphtheria, and pertussis. It is recommended for adolescents and adults to protect against these serious diseases and prevent their spread to vulnerable individuals, especially young infants.
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Frequently asked questions
No, the Tdap vaccine was licensed in 2005 as an improved version of the typical tetanus booster, Td.
In the 1970s, vaccines were available to protect against mumps (1967), rubella (1969), measles (1963), diphtheria, tetanus, pertussis, polio, and smallpox. These were combined into the MMR and DTP vaccines.
Tdap stands for tetanus, diphtheria, and acellular pertussis (whooping cough).
The CDC recommends that all adults get the Tdap vaccine if they did not receive it as an adolescent. It is especially important for those who will be around young infants, as they can unwittingly pass on pertussis, which can be fatal to young children.
