What is smallpox? Why is smallpox the only infectious disease that mankind has completely defeated?

Smallpox is a contagious disease, a particularly terrible disease in ancient times, and it is very contagious. Since the beginning of the last century, human pox injections have been used to prevent smallpox infection, and it has become the only infectious disease that has been completely defeated.

Smallpox is a virulent infectious disease because of the improvement of medical care, the vaccination of everyone, the continuous advancement of science and technology, and the study of the disease more thoroughly.

The main reason is that there is no smallpox virus in the world for a long time, and it has been eliminated by humans.

Because in the history of mankind, the first virus successfully eradicated was called smallpox, so it went down in history.

Smallpox is a virulent infectious disease and the causative agent is the smallpox virus.

Smallpox is highly contagious and has a high mortality rate, with the most common being smallpox, with a mortality rate of 20 to 40 percent. It can be transmitted through airborne droplets, breathe into the human body, and spread rapidly from person to person, which can cause large-scale epidemics. Smallpox was also very scary at the time of its onset, with severe systemic symptoms, ** a large number of measles, papules, and scars.

In 1979, the World Health Organization declared smallpox to be eradicated. There are only two laboratories in the world that keep samples of live smallpox virus, one is a laboratory at the Centers for Disease Control in Atlanta, USA, and the other is at the Vector Research Center in Russia.

If you have this disease, you will first have a fever, and then there will be pustules all over your body, and the mortality rate is much higher than that of the current new crown pneumonia. Even if many people are cured, they will be left with pockmarks on their faces. (Let the bullets fly, talk about pockmarked fragments) 18th century Europe, smallpox epidemic.

Schools were closed, factories were shut down, theaters were closed, and more than 60 million people died of smallpox and hemp throughout Europe.

Smallpox is an infectious disease with a high mortality rate, and if it is cured, it will leave irregular patterns on it, so this disease is called smallpox, and this disease is now extinct, because we were born with cowpox, which is a natural vaccine for smallpox.

Answer: Parsing the source:

When a person has smallpox, the antibodies produced by the lymphocytes in the body against smallpox remain in the body after the disease is cured, so the person will not get smallpox again in the future.

Smallpox is commonly known as pockmarked seeds.

Smallpox is a virulent infectious disease caused by the smallpox virus and the first infectious disease to be eradicated by humans worldwide. According to reports, on December 21 of the same year, Bush of the United States took the lead in vaccinating against smallpox in order to prevent biological attacks. Because the smallpox virus, like the anthrax bacillus, has a very powerful lethality if it is used as a biological **, it is called a "poor man's nuclear bomb".

In our country, smallpox was eradicated decades ago, and now ordinary people know nothing about smallpox, and many doctors only hear about it, but do not see it. Here's a quick overview of smallpox.

The smallpox virus is brick-shaped, about 200 microns to 300 microns, and is highly resistant, resistant to dryness and low temperatures, and can survive for several months to a year and a half on scabs, dust, and clothing. The smallpox virus is highly contagious and can be contracted by people who have not had or have not been vaccinated against smallpox, including men, women, and children, including newborns. Smallpox is mainly transmitted by droplet inhalation or direct contact, and when a person is infected with smallpox virus, there is an incubation period of about 10 days, after which the patient becomes very acute, mostly with headache, back pain, chills or chills.

Symptoms such as high fever can begin with a body temperature of up to 41 or more. Accompanied by nausea, vomiting, constipation, insomnia, etc. Vomiting and seizures are common in children.

3 5 days after onset, the patient develops a rash on the forehead, cheeks, wrists, arms, trunk, and lower extremities. It starts as a red macule, then becomes a papule, after 2 to 3 days the papules turn into herpes, and then the herpes turns into a pustular rash. 2 to 3 days after the formation of the pustular rash, it gradually dries and shrinks into a thick crust, and after about 1 month, the scab begins to fall off, leaving a scar, commonly known as "numbness".