Description

Smallpox is a serious, often fatal viral infection. It is contagious, which means that it is transmitted from person to person and can cause permanent scarring. At times, cause disfigurement.

Smallpox has affected humans for thousands of years, but was eliminated in all over the world in 1980, thanks to the smallpox vaccine. Because it is not found naturally in the world. The last case of naturally occurring smallpox was reported in 1977.

Samples of smallpox virus have been kept for research purposes. And scientific advances have made possible the creation of the smallpox in a lab. This has led to concerns that smallpox could someday be used as a biological weapon.

The vaccine can prevent smallpox, but because most of the people can't come in contact with the smallpox, of course, routine vaccination is not recommended. New antiviral medications can be used to treat people who develop smallpox.

Symptoms

The first symptoms usually appear 12 to 14 days after being exposed to the smallpox virus. However, the virus can be in your body from 7 to 19 days before you see or feel bad. This time is called the incubation period.

After the incubation period, sudden flu-like symptoms. These include:

  • Fever
  • Muscle aches
  • Headache
  • Severe fatigue
  • Severe back pain
  • Vomiting, sometimes

A few days later, flat, red spots appear on the body. You can begin in the mouth and on the tongue and then spread to the skin. The face, arms and legs are often affected first, followed by the torso, the hands and feet.

Within a day or two, many of the places that turn into small blisters filled with clear fluid. Later, the blisters are filled with pus. These sores are called pustules. Scabs form of 8 to 9 days later, and eventually fall off, leaving deep, pitted scars.

Smallpox can be spread from person-to-person when the rash appears and until the scabs fall off.

Causes

Smallpox is caused by variola virus. The virus can spread:

  • Directly from person to person. You can catch the virus of smallpox, by being near someone who has it. An infected person can spread the virus by coughing, sneezing or talking. Enter in contact with the sores on the skin can also cause you to get smallpox.
  • Indirectly from an infected person. Rarely, smallpox can spread through the air inside the buildings, infecting people in other rooms or on other floors.
  • Through contaminated items. Smallpox also can be spread through contact with contaminated clothing and bed linen. But getting the smallpox in this way it is less likely.
  • As a terrorist weapon, potentially. The use of smallpox as a weapon is a rare threat. But due to the release of the virus may spread the disease quickly, governments are preparing for this possibility.

Complications

Most of the people who receive the smallpox survive. However, some rare types of smallpox are almost always fatal. These more severe forms are most common in pregnant women and children.

People who are recovering from smallpox often have severe scarring, especially on the face, arms and legs. Sometimes, the smallpox causes loss of vision (blindness).

Prevention

If a smallpox outbreak that happened, the people with smallpox would be isolated to try to stop the spread of the virus. Any person who has had contact with someone who had the smallpox, you need a vaccine against smallpox. A vaccine that can protect against the disease or cause less sick if you get smallpox. The vaccine should be given before or a week after exposure to the virus.

There are two vaccines available:

  • The ACAM2000 vaccine uses a live virus that, like smallpox, but less harmful. It can sometimes cause serious side effects, such as infections in the heart or the brain. That is why the vaccine is not given to everyone. Unless there is a smallpox outbreak, the risks of the vaccine outweigh the benefits for most people.
  • A second vaccine (Jynneos) uses a very weakened strain of the virus and is more secure than ACAM2000. Can be used in people who cannot take ACAM2000 due to the compromised immune systems or skin disorders.

Smallpox vaccines also provide protection against other similar viral infections such as mpox, also known as monkeypox, and cowpox.

Persons vaccinated as children

If you had the vaccine against smallpox as a child, you have some level of protection against the smallpox virus. Total or partial immunity after smallpox vaccine can last up to 10 years, and 20 years, with booster shots. If an outbreak occurred, the people who received the vaccine as children are likely to get a new vaccination if they were exposed to the virus.

Diagnosis

If a smallpox outbreak that happened today, the majority of health care providers is probably not recognize the virus in its early stages. This would mean that the smallpox virus spreads.

Even in a case of smallpox would be a public health emergency. The Centers for Disease Control and Prevention uses special testing laboratories of tissue samples for smallpox. This test can know with certainty if a person has the virus.

Treatment

If someone were infected with smallpox, new antiviral drugs can be used.

  • Tecovirimat (Tpoxx). The Food and Drug Administration (FDA) approved this drug for use in the united states in 2018. The research found that it worked in animals and in laboratory tests. However, it has not been tested in people who are sick from smallpox. So I don't know if it is an effective drug option. A study tested in healthy people and found to be safe.
  • Brincidofovir (Tembexa). The FDA approved this drug in the year 2021 for use in the united states As tecovirimat, the researchers tested brincidofovir in animals and in the laboratory. The research has not been tested in people who have smallpox. It has been safely given to healthy people and people with other types of viruses.

It is unknown whether these drugs work in a person with smallpox. The investigation continues for the study of other antiviral drugs for the treatment of smallpox.

Symptoms and treatment of Smallpox