What is “pre-symptomatic”? Foreign media explain three new concepts related to novel Coronavirus

Buenos Aires, Argentina (10 June), economic News network, explains three new concepts related to novel Coronavirus: supercommunicator, immune memory, and pre-symptom patient.
The content of the article is summarized as follows:

Covid-19 is highly contagious and spreads exponentially over a short period of time, distinguishing it from SARS and MERS, which are caused by the coronavirus family.
Covid-19 is most contagious in the first few days before positive patients show symptoms, so these patients are also known as pre-symptomatic patients.

Super spreaders are defined as 20 per cent of infected people causing 80 per cent of outbreaks.

For immune memory, Harvard University professor, heart specialist Michael Gibson gives the explanation: “although the body will be no coronavirus antibody, but in front of exposure to the virus were between 40% and 60% have T cells, they can to virus attacks, has prompted these T cells is related to the coronavirus common cold.”

“We are learning more and more about this virus,” Cardiologist Oscar Chingolani, director of the Hypertension and cardiovascular Disease intensive care unit at Johns Hopkins Hospital, told reporters.
In addition to home isolation, social isolation and wearing masks are mandatory and effective.”

Chingolani said some countries have managed the outbreak better because of a combination of quarantine and early detection.

In a study, the team of Epidemiologists Dillon C. Adam and Benjamin J. Cowling of the University of Hong Kong introduced R0 and K values into a performance analysis of COVID-19, two key factors in controlling transmission.

R0, also known as the basic number of infections, is the average number of people infected with an infectious disease who transmit the disease to other people without intervention and no one has immunity.
It was learned that novel Coronavirus had R0 between 2 and 3 and that when R0 was less than 1, the infectious disease would gradually disappear.

Adam and Collin also mentioned another important factor in their study — the K value.
“The smaller the number of infections that cause all transmission, the smaller the K value in general;
But other factors, such as the equally important R0, cannot be ignored.
In the case of COVID-19, there is increasing evidence that superspreader is a fairly important factor in the transmission of the virus.”

“How can coVID-19 transmission be effectively controlled?”
“By far the easiest and most feasible way is to avoid enclosed Spaces, especially using masks, and to stop using social customs such as meeting, kissing and hugging,” Chingolani said.
What about the super-spreader?
From an epidemiological point of view, isolate them.”

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