Sarah Bennett
Smallpox is a serious infectious disease caused by the variola virus. It is one of the deadliest diseases known to humans, killing at least one in three people infected. The symptoms of smallpox are gruesome: high fever, vomiting, mouth sores, and fluid-filled lesions on the whole body. The smallpox vaccine is the best protection you can get if you are exposed to the smallpox virus. The smallpox vaccine is given using a two-pronged (bifurcated) needle that is dipped into the vaccine solution. The needle is then used to prick the skin several times in a few seconds. The smallpox vaccine is not currently recommended for the general public because smallpox has been eradicated. However, the U.S. government has stockpiled enough smallpox vaccine to vaccinate everyone if an outbreak were to occur.
| Characteristics | Values |
|---|---|
| Is there a vaccine for smallpox? | Yes |
| Is the vaccine recommended for the general public? | No |
| Is the vaccine effective? | Yes, it is the best protection if exposed to smallpox |
| How long does the vaccine last? | 3 to 5 years |
| Can the vaccine be administered to everyone? | No, people with certain conditions or weakened immune systems should not get the vaccine |
| What are the side effects of the vaccine? | Mild: sore arm, fever, body aches; Serious but not life-threatening: toxic or allergic reaction at the site of vaccination; Rare: life-threatening reactions such as eczema vaccinatum, progressive vaccinia, postvaccinal encephalitis |
| How is the vaccine administered? | Using a two-pronged (bifurcated) needle that is dipped into the vaccine solution and used to prick the skin |
| What is the mortality rate of smallpox without vaccination? | Up to 35% in some outbreaks |
| Has smallpox been eradicated? | Yes, it is the only human disease to have been eradicated |
| When was smallpox eradicated? | 1970s |
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What You'll Learn
- Smallpox vaccines are not recommended for the general public
- The smallpox vaccine is the best protection against smallpox
- The smallpox vaccine is administered using a two-pronged needle
- The smallpox vaccine has gone through several generations of medical technology
- Smallpox vaccination can cause side effects and adverse reactions
Smallpox vaccines are not recommended for the general public
Smallpox vaccines are currently not recommended for the general public because the disease has been eradicated, and the virus no longer exists in nature. The last case of smallpox was reported in 1977. Routine smallpox vaccination among the American public was stopped in 1972 after the disease was eradicated in the United States.
The smallpox vaccine is highly effective in preventing smallpox infection, with a success rate of 95% among those vaccinated. The vaccine is made from a virus called vaccinia, which is a poxvirus similar to smallpox but less harmful. The smallpox vaccine contains a live vaccinia virus, not a killed or weakened virus like many other vaccines. The immunity offered by the vaccine lasts for about 3 to 5 years, after which a booster shot may be required.
While the smallpox vaccine is generally safe for people with healthy immune systems, it does have some side effects, ranging from mild to severe and, in rare cases, life-threatening. Mild side effects include a sore arm, fever, and body aches. More severe side effects include a vigorous (toxic or allergic) reaction at the vaccination site and the spread of the vaccinia virus to other parts of the body and to other people. In the past, about 1,000 people per million vaccinated experienced serious but non-life-threatening reactions, while between 14 and 52 people per million vaccinated experienced potentially life-threatening reactions, including eczema vaccinatum, progressive vaccinia, and postvaccinal encephalitis.
Due to the potential risks associated with the smallpox vaccine, careful screening of vaccine recipients is essential to ensure that those at increased risk do not receive it. People with certain medical conditions, such as skin conditions or weakened immune systems, are advised not to get the smallpox vaccine unless they are exposed to the disease. Additionally, the Advisory Committee on Immunization Practices (ACIP) advises against the non-emergency use of the smallpox vaccine in children younger than 18 years and geriatric populations (generally those aged 65 and above).
In the event of a smallpox outbreak, health officials have sufficient vaccine stockpiles to vaccinate everyone who would need it, and the vaccine would be used to control the outbreak.
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The smallpox vaccine is the best protection against smallpox
Smallpox is a serious infectious disease caused by the variola virus. It has been a deadly disease that has killed hundreds of millions of people over thousands of years. The symptoms of smallpox are gruesome: high fever, vomiting, and mouth sores, followed by fluid-filled lesions on the whole body. It is also highly contagious.
The smallpox vaccine is the best protection you can get if you are exposed to the smallpox virus. The smallpox vaccine is made from a virus called vaccinia, which is a poxvirus similar to smallpox but less harmful. The smallpox vaccine does not contain the smallpox virus and cannot give you smallpox. In the past, the vaccine has been proven to be effective in preventing smallpox infection in 95% of those vaccinated.
The smallpox vaccine is given using a two-pronged (bifurcated) needle that is dipped into the vaccine solution. The needle is then used to prick the skin a few times in a few seconds. The vaccination site is usually in the upper arm. If the vaccination is successful, a red and itchy bump develops at the vaccination site in three or four days. In the first week after vaccination, the bump becomes a large blister, fills with pus, and begins to drain. During the second week, the blister begins to dry up and a scab forms. The scab falls off in the third week, leaving a small scar. People who are being vaccinated for the first time may have stronger reactions than those who are being revaccinated. These reactions can include a sore arm, fever, and body aches.
Smallpox vaccination is no longer recommended for the general public since the disease has been eradicated. However, the U.S. government has stockpiled enough smallpox vaccine to vaccinate everyone if an outbreak were to occur.
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The smallpox vaccine is administered using a two-pronged needle
Smallpox vaccines are not recommended for the general public because smallpox has been eradicated. However, the vaccines will be used to control an outbreak if it occurs. The smallpox vaccine is distinct from other vaccines in the way it is administered. It is given using a two-pronged (bifurcated) needle that is dipped into the vaccine solution. When removed, the needle holds a droplet of the vaccine. The needle is used to prick the skin several times in a few seconds. The pricking is not deep, but it will cause a sore spot and one or two drops of blood to form. The vaccine is usually administered in the upper arm.
The two-pronged needle was invented in 1965 by Dr Benjamin Rubin, who worked at Wyeth Laboratories. It was created as a more efficient and cost-effective alternative to the jet injector previously in use. The needle was easy to use and sterilise, and the technique could be learned by anyone, making widespread effective vaccination possible. It was the primary instrument used during the World Health Organization's 1966–1977 campaign to eradicate smallpox.
If the vaccination is successful, a red and itchy bump develops at the vaccination site in three or four days. In the first week after vaccination, the bump becomes a large blister, fills with pus, and begins to drain. During the second week, the blister begins to dry up and a scab forms. The scab falls off in the third week, leaving a small scar. People who are being vaccinated for the first time have a stronger reaction than those who are being revaccinated.
Smallpox vaccination can protect you from smallpox for about 3 to 5 years. After that time, its ability to protect you decreases. If you need long-term protection, you may need to get a booster vaccination. Historically, the vaccine has been effective in preventing smallpox infection in 95% of those vaccinated. The smallpox vaccine does not contain the smallpox virus and cannot give you smallpox. However, it does have some serious risks. In the past, about 1,000 people for every 1 million people vaccinated experienced reactions that, while not life-threatening, were serious. These reactions include a vigorous (toxic or allergic) reaction at the site of the vaccination and the spread of the vaccinia virus to other parts of the body and to other people.
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The smallpox vaccine has gone through several generations of medical technology
The smallpox vaccine has indeed gone through several generations of medical technology. The earliest form of smallpox inoculation was likely practised in Africa and China, and possibly India, before arriving in Europe. This method, known as variolation, involved exposing individuals to material from smallpox sores (usually by scratching it into their arm or having them inhale it through the nose) and was brought to public attention in the American colonies by Cotton Mather in 1716.
The first modern vaccine was demonstrated in 1796 by English doctor Edward Jenner, who used the same principle as variolation but with a less dangerous viral source: cowpox. Jenner inoculated 8-year-old James Phipps with matter from a cowpox sore on the hand of Sarah Nelmes, a local milkmaid. Phipps had a mild reaction and recovered fully. Two months later, Jenner inoculated Phipps with matter from a human smallpox sore, and Phipps did not develop smallpox. This led to the development of the smallpox vaccine, which was transmitted from one person to another through arm-to-arm vaccination from 1796 until the 1880s.
In the 1840s, the smallpox vaccine was successfully maintained in cattle, and the calf lymph vaccine became the leading vaccine in the 1880s. First-generation vaccines, grown on the skin of live animals, were widely distributed in the 1950s to 1970s. During this time, mandatory smallpox vaccination was implemented in Britain, the US, and other parts of the world, and smallpox vaccination certificates were required for travel.
In the late 1970s, the last cases of naturally acquired smallpox were reported, and by the 1980s, smallpox was eradicated. The World Health Organization (WHO) maintained a stockpile of 200 million vaccine doses in 1980 to guard against the re-emergence of the disease, but 99% of this stockpile was destroyed when smallpox failed to return. However, after the September 11, 2001 attacks, fears of bioterrorism led to the resumption of smallpox vaccine production and stockpiling by governments.
Today, smallpox vaccines are not recommended for the general public due to the eradication of the disease. However, health officials would use smallpox vaccines to control an outbreak if one were to occur. The current smallpox vaccines are made from the vaccinia virus, a poxvirus similar to smallpox but less harmful, and they do not contain the smallpox virus and cannot give someone smallpox.
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Smallpox vaccination can cause side effects and adverse reactions
Smallpox is a serious infectious disease caused by the variola virus. Vaccination led to the eradication of smallpox, with the last case seen in 1977. The smallpox vaccine is the best protection you can get if you are exposed to the smallpox virus. However, the smallpox vaccine can cause side effects and adverse reactions. For most people, the smallpox vaccination is safe and effective, with mild reactions such as a sore arm, fever, and body aches.
Some people may experience more severe reactions, such as a buildup of inflamed tissue around the vaccination site, which can develop into a large, non-healing sore known as progressive vaccinia. This usually occurs in people with deficient immune systems. Other serious reactions include inflammation of the brain (postvaccinal encephalitis) and heart inflammation (myocarditis). In rare cases, the vaccine can even lead to death, with estimates of 1 to 2 deaths per million people vaccinated due to life-threatening reactions.
People with certain medical conditions, including weakened immune systems and specific skin conditions, are more likely to experience adverse reactions and should not receive the smallpox vaccine unless exposed to smallpox. It is important to consult with a healthcare professional to assess the risks and benefits of the smallpox vaccine for each individual. Additionally, the smallpox vaccine may interact with certain medications, and it is crucial to inform your doctor about any current prescriptions or medical history.
While the smallpox vaccine has been a significant achievement in human history, it is currently not recommended for the general public due to the eradication of smallpox. However, in the event of a smallpox outbreak, health officials would use the smallpox vaccine to control it. The decision to receive the smallpox vaccine involves weighing the risks of the vaccine against the benefits of protection from smallpox exposure.
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Frequently asked questions
Yes, there are vaccines to protect against smallpox.
No, the smallpox vaccine is not recommended for the general public because smallpox has been eradicated.
In the event of a smallpox outbreak, health officials would use smallpox vaccines to control it. The US government has stockpiled enough smallpox vaccine to vaccinate everyone if an outbreak were to occur.
The smallpox vaccine is given using a two-pronged (bifurcated) needle that is dipped into the vaccine solution. The vaccine is usually given in the upper arm.
Most people experience mild reactions to the smallpox vaccine, including a sore arm, fever, and body aches. However, there is a risk of more serious side effects, including a vigorous reaction at the vaccination site and the spread of the vaccinia virus to other parts of the body and other people.
