Measles is one of the oldest diseases still prevalent in Third World countries.
The first cases of measles were reported in the seventh century, according to the Center for Control and Prevention of Infectious Diseases (CDC), which estimates that the mortality rate is 15 to 25 percent if a person is not vaccinated.
Because of the duration of measles survival, it is not possible to determine how many lives the disease has taken.
According to the World Health Organization, measles (pneumonia) is the most contagious disease and 92 to 95 percent of the population needs to be vaccinated, so the remaining five to eight percent will not.
Polio, or polio, was recorded as a very dangerous disease in the eighteenth century, most often affecting children between the ages of three and eight.
Before the advent of the vaccine in the middle of the last century, the mortality rate was two to five percent in children and 15 to 30 percent in adults, and that percentage increased to 75 percent with brain complications.
The World Health Organization (WHO) estimates that about 80 percent of polio cases (transmitted through the oral-fecal route) require collective immunity.
Smallpox or smallpox is probably the oldest existing disease because it originated in India about 3,000 years ago.
Data from the World Health Organization shows that the mortality rate without vaccination is 30% and that survivors have permanent scars.
It is not known how many people died from the virus.
Experts from the World Health Organization (WHO) suggest that immunization against smallpox (airborne droplets) is essential.
The pertussis vaccine was developed in 1926, but according to the American CDC, there are currently 24.1 million cases worldwide, and 160,000 people die each year.
According to data from Harvard, 92-94 percent of people need an immune system to protect themselves from the hopping cough (spreading air and drops).
Mumps is a very old disease that was first reported in the 5th century, and the mortality rate per 10,000 inhabitants is 1.6 to 3.8 percent due to complications caused by inflammation of the brain.
Data from Harvard show that airborne and droplet mumps require 75 to 86 percent of the population’s immunity, and that the vaccine was developed in 1967.
In developed countries, the rubella (air and drop transmission) mortality rate is 0.05 to 0.1 percent per 1,000 cases, which is much lower than in Third World countries, with three to six percent.
The virus was registered in 1815, and the vaccine was developed in 1967. It is estimated that 83 to 85 percent of immunizations produce collective immunity, according to data from Harvard.
SARS was detected in China in 2002 and was active until 2004, when it spreads through air and droplets.
The World Health Organization estimates that the death toll from the epidemic was about 11%, affecting all four countries except China.
When the World Health Organization announced the end of the epidemic in July 2003, 8,098 people became infected and 774 died, although there were many more cases next year.
Although the virus has disappeared with Nigu ly, the vaccine is not yet available.
It is estimated that immunity to SARS (airborne and droplet transmission) is required to prevent the spread of 50 to 80 percent of the population.
Ebola, the most dangerous of these viruses (transmitted through body fluids), has a 50 percent mortality rate.
The first case was reported in the Congo in 1976, when it was estimated that more than 80 percent of people would need to be vaccinated to get immunity to livestock, but that number is uncertain because the US FDA (Food and Drug Administration) approved the first vaccine in 2019.
In addition to Ebola, the biggest threat to humanity is “Cousin” Kovid-19 – Merz.
Merozo belongs to the group of corona viruses, the first case was reported in Jeddah, Saudi Arabia in 2012, and the death toll in January 2020 was between 34 and 35, according to the World Health Organization.
Of the 2,519 deaths, 858 deaths were attributed to a single case of camel disease, which spreads the virus to humans.
It is still not entirely clear whether it is transmitted by droplets or some other means of transmission from person to person.
When it comes to Kovid 19, one of the airborne and droplet-borne coronaviruses, scientists still can’t figure out what percentage of the animal’s immune system needs immunity, especially since it’s a virus that returns shortly after, and it’s not been known about him for months.
More than 15 million people have died from Kovida 19 so far, affecting more than 70 million cases worldwide, and scientists have not yet agreed that to stop the spread, 60 to 80 percent of people need immunizations.
Collective immunity or “animal immunity” develops when the majority of individuals in a community develop immunity to a disease that prevents the spread of the disease, thus protecting not only those who are immune to a particular disease, but the entire community.
In order to develop collective immunity, people need to be vaccinated first, the spread of infection first, so there must be different percentages of different diseases to develop “animal immunity”.