SARS - CoV - 2, the virus that causes COVID-19 is the third outbreak of a major virus beta Corona. We've known about viruses the beta-Cov in humans since the sixties but we were never able to develop a vaccine. The most likely scenarios are that the virus fades like SARS or simply becomes part of the natural flu season. Real anxiety is not COVID-19 but the next virus that runs its worn-out path to the human viral landscape.
Confined to virus beta Corona position of the gene pool of the bat, but some can infect humans directly or indirectly (via other mammals such as beauty, mice, ants, and cats).
These viruses have been bothering humanity for at least a century, we know. Colds are virus beta. Corona (CoV OC43) was first discovered in 1965, there are other kind of colds (CoV-HKU1) is widely spread in the population since 2005 at least. In Cleveland, Ohio, for example, showed that 18 had HKU1, and 18 had their OC43 and 7 Was have variables other cool less common (NL63 and 229E). Revealed a similar study in Malaysia in the same year, 26 cases OC43 and 22 the case of HKU1 in a sample of patients 2060. Refer genetic study for OC43 and HKU1 that we both share a common ancestor and was in the trading human since the fifties.
We discovered in late 2002 that beta Corona viruses could be more dangerous than common cold. There was a different type completely, it was renamed as the SARS virus, the virus that causes SARS, which is something completely different. Death from viral pneumonia was a real possibility. He became our first known coronary virus epidemic during his short career during the northern winter of 2002-2003. It was limited to 8096 cases, resulting in 774 deaths, mostly in South-East Asia.
One of the oldest known cases was a chef in Shenzhen, near Guangzhou, South China. He regularly dealt with the wild game recently slaughtered. His wife, two sisters and seven hospital staff who were in contact with the family were diagnosed with SARS. In the period from 16 November 2002 to 9 February 2003, has been reported from 305 cases in mainland China, more than a third of those cases involve health care workers.
The virus arrived in Hong Kong on February 21, 2003, when Guangzhou's pathologist, who is ill, visited the city. Within a day, he injured 16 other people at his hotel. These people inadvertently carried the virus to another 30 nations during the next six months.
Subsequent analysis proved that the possible natural reservoir of the virus was a Chinese horseshoe bat. SARS - CoV is an animal virus, which means that the virus is transmitted between animals and people, but once it's spread among humans, spreading easily from person to person.
The period of custody was between 2 and 14 days and the person affected by the disease would be infected between 2 and 4 more days. Unlike viruses of the flu, which is most of the infection in two days the first two of the disease, the injury of SARS patients who show symptoms usually occur on the fifth day of onset of the disease or after. This is consistent with the high viral load in the nasal mucus, which peaked at about Day 10. Fever, tremors, dry cough and muscle pain were major symptoms. The infection in children was lighter than in adults. In pregnant women, SARS carried a high risk of death.
It was the most important way to spread from one person to another is the inhalation of droplet infectious airborne or touching hard surfaces that landed them that the droplets (and then touching the face or food). The virus can survive on hard surfaces for up to 7 days, but be disabled easily with soap, alcohol, or antiseptics and other common. The virus has lasted longer in plastic hospital robes that can be disposed of more than lumbar robes. Therefore, cotton robes are preferred in hospital care settings. Subsequent tests also revealed that the risks of paper transportation were very small. Even when the page is sprayed with a large viral load, viable virus molecules cannot be recovered after the paper has been dried.
By far, it was the most vulnerable place in the hospital. Hospital transport was more likely where sprayers, suction, intubation, bronchoscopy, or CPR were used on SARS patients. All these actions generate large numbers of infectious drops. About half the SARS in Hong Kong were found in hospitals.
The SARS epidemic eventually spread, not because of anything we did to stop it, but because it developed a mutation that has not yet been explained, weakening its ability to spread.
Showed subsequent studies that the virus has infected between 13 and 40% of the customers food animals without symptoms in South China. Likely to have continuous exposure for animals to animals living and deceased recently is a perfect pick for mutations that can jump from animals to humans. Processors are constantly exposed to