- A new study states that asymptomatic coronoviruses are far more rare than most specialists – a new study says that the more severe the disease, the more likely a COVID-19 patient is to infect others.
- The news will still not be as good as it may seem because other studies have confirmed that COVID-19 transmission occurs before the onset of symptoms.
- Preceptomatic patients can infect others before they develop symptoms themselves, which is why masks, social distance, and hand washing are important.
The novel coronavirus has now infected more than 25.5 million people, of whom we know. These are all confirmed COVID-19 cases, although the actual number is likely to be much higher. Many people get the virus and never show any symptoms – or they are not tested. It is therefore important to follow the safety measures that health officials advise around the world, including social disturbances, frequent washing of hands and, of course, face masks. The biggest concern of health authorities is that asymptomatic transmission of COVID-19 may result in outbreaks. Silent spreaders who have no idea they are infected, or who think they cannot harm others, can pass the virus on to other people. There has been much debate as to whether the asymmetries can actually spread the virus, and there are many studies that have shown people who never have symptoms reproduce the virus as their bodies fight infection. . Other studies suggest that asymptomatic people can also spread the disease, such as a recent study in South Korea that asymptomatic transmission in an airplane is possible despite precautions.
But, again, true asymptomatic transmission is a topic that needs more research for better management of the epidemic. And a new study indicates that asymptomatic COVID-19 proliferation may be as rare as we think.
Researchers at Southern Medical University in Guangzhou have written a study Anal of internal medicine (Via Just the news) Which states that asymptomatic transmission is rare. Researchers studied “secondary attack rates” for various groups of COVID-19 infections. This is the reason that the person spreading the disease is likely to come in contact. They found that patients who experienced a more severe case of COVID-19 were more likely to infect their close contacts than less severe cases. The researchers found, “asymptomatic cases were least likely to infect their close contacts.”
The study also noted that the risk of transmission through public transport and healthcare is lower than in households. This is because people are less likely to wear masks at home, while masks are mandatory in many public settings. This is a great detail, which should persuade more elected officials to give masked mandates in communities where the virus is still prevalent.
This seems to be big news, because a large number of people were involved in the study. Early epidemic exposure was observed in about 3,410 391 index cases for about two months. “Our results showed that patients with COVID-19 had more severe symptoms, with higher transmission capacity, while transmission capacity was limited by asymptomatic cases,” the researchers wrote. “This supports the World Health Organization (WHO) view that asymptomatic cases were not the major drivers of overall epidemiological dynamics.”
“It may be the mechanism that COVID-19 may lead to more viral load of SARS-CoV-2 with more severe symptoms and thus higher transmission capacity,” he said. And here comes the first major limitation of the study. Researchers may have noticed a different strain of the virus that is currently wreaking havoc around the world. The virus infects far more people in Europe and America than it does in China, and suspicion of reducing China’s cases may only be part of the cause. Some researchers believe that a major coronavirus mutation outside of China has made the virus stronger and more contagious, although it is not previously fatal. This is the D614G mutation that is now making a comeback in Asia.
Secondly, while the study aligns with WHO’s view that asymptomatic cases are not the primary drivers of the disease, the organization made a clear distinction on the matter in the COVID-19 transmission update a few weeks ago. The WHO stated that individuals without symptoms can infect others, dividing those who do not experience COVID-19 symptoms into two categories. We are actually seeing asymptoms that never exhibit any COVID-19 signs and can only be diagnosed through a PRC test, and a pre-determined number of people who have the disease before the onset of symptoms. Can spread.
Early data from China suggested that people without symptoms could infect others. To better understand the role of transmission from infected people without symptoms, it is important to distinguish between transmission from people who are never infected (asymptomatic transmission) and transmission from people who are not infected but have yet to develop Symptoms are not (presymptomatic transmission). This difference is important when developing public health strategies to control transmission.
The same update suggests that the extent of asymptomatic dissemination in the community is unknown, and it details other studies that looked at asymptomatic and retrospective transmission. The list includes a modeling study that estimates that up to 44% of transmission may have occurred in people immediately before symptoms appear.
Put differently, if you think or know that you have been infected, but you are not showing symptoms, you cannot say for sure if you are healthy, asymptomatic, or conceited. Only a PCR test and time will tell the full story. Because symptoms may still appear later during an infection, it is important to isolate yourself and observe safety measures even when you are not showing any symptoms.