Which are four viral diseases like COVID-19 whose vaccines are not prepared so for??

4 Viruses like Corona Virus whose Vaccines Still not Prepared

Millions of people around the world are waiting for the vaccine. Experts warn that no matter how fast the vaccine development process may take time, it may take time and the vaccine may not be discovered if the situation worsens.
The World Health Organization (WHO) said, "We may have to live with the virus".
However, the chances of living with the virus can be devastating because of the fact that so far about 7 million people have been infected and more than 400,000 people have died from the infection.
The search for a vaccine can continue for years or decades. These efforts may be wasted and may yield good results, as seen in the case of Ebola.
Ebola was first reported in 1976. At that time, the death toll was 50 percent. As of the beginning of this year, no vaccine had been developed. The World Health Organization and some other countries have finally approved a vaccine to prevent it.
But here we are talking about four other deadly viruses whose vaccine has not yet been developed.

HIV

It has been more than thirty years since the HIV virus was discovered. AIDS is caused by the HIV virus. According to the World Health Organization, 32 million people worldwide have been diagnosed with AIDS so far.
HIV has a significant impact on people's lifestyles. People have been forced to change their sexual habits because the main cause of HIV infection is sex.
Early cases of AIDS were found in gay people. That is why there was a sense of stigma attached to the disease. In some parts of the media, it was also called 'gay cancer'.
Today, almost four decades later, no medicine has been developed. Forty million people worldwide have been affected.
Eradication of the virus seems a long way off.
However, it can be prevented with precaution and the effect can be reduced with treatment so that the affected person can lead a normal life.
There have been two recent cases in which HIV-infected people have been treated with stem cells, but experts warn that this treatment can be dangerous and not in all cases of HIV infection. Can be tried

Avian influenza

Two types of avian influenza have been reported since the late 1990's and many people have died from the infection.
The virus is transmitted to humans through bird droppings. The H5N1 virus was first detected in Hong Kong in 1997. Because of this, a large number of chickens were killed there.
 So far, the virus has reached more than 50 countries in Africa, Asia and Europe. The death rate from this virus is 60%. In May 2013, the H5N1 virus was detected in China, where various cases of H. pylori infection were reported.
According to the WHO, a total of 1,565 infections were reported between 2013 and 2017, of which 39% died.
The spread of the virus from human to human is unusual, according to the World Health Organization. Once proven, it's easy to stop.

SARS(Severe Acute Respiratory Syndrome)

SARS is a type of corona virus.The first case of the infection was reported in 2002 in the Chinese province of Guangzhou. The virus causes severe difficulty breathing. In 2003, more than 8,000 people in 26 countries were affected.
Since then, fewer cases of infection have been reported.
Unlike avian influenza, the virus is transmitted primarily from humans to humans and, in fact, is more likely to be transmitted to health facilities because no significant precautions have been taken to prevent it. Were
According to the World Health Organization, as soon as precautionary measures were taken to prevent the infection, the infection stopped in July 2003.
There have been more than 8,400 patients of the virus, killing 916 people. The death rate is 11%.

MERS(Middle East Respiratory Syndrome)

MERS-CoV is also a type of corona virus. It was first revealed in 2012. It causes a disease called MERS. The disease has a high mortality rate. As of November 2019, 2,494 people worldwide were infected with the virus, and 858 of them died.
The virus was first reported in Saudi Arabia, but has since been found in 27 countries. These include 12 countries in the Middle East.
According to the World Health Organization, countries outside the Middle East where these cases of infection have been found have actually come from the same region.
The virus is mainly transmitted from animals to humans. The Arabian camel is thought to be the primary source of the virus.
Human-to-human infection is rare. Efforts to develop the vaccine were postponed after the situation in both Mars and SARS was brought under control.