Coronavirus(Covid-19) vs Ebola outbreaks: which one is worse? – In1080pHD – Some Explanations Below

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Where did the virus originate?
When humans do become infected with a coronavirus, this typically happens via contact with an infected animal.

Some of the most common carriers are bats, although they do not typically transmit coronaviruses directly to humans. Instead, the transmission might occur via an “intermediary” animal, which will usually — though not always — be a domestic one.

The SARS coronavirus spread to humans via civet cats, while the MERS virus spread via dromedaries. However, it can be difficult to determine the animal from which a coronavirus infection first starts spreading.

In the case of the new coronavirus, initial reports from China tied the outbreak to a seafood market in central Wuhan. As a result, local authorities closed down the market on January 1.

However, later assessments have since suggested that this market was unlikely to be the single source of the coronavirus outbreak, as some of the people infected with the virus had not been frequenting the market.

Specialists have not yet been able to determine the true source of the virus or even confirm whether there was a single original reservoir.

When MNT contacted the WHO for comment, their spokespeople emphasized:

“We don’t yet know [what the specific source of 2019-nCoV was]. Researchers in China are studying this but have not yet identified a source.“

How is the virus transmitted?
While it likely originated in animals, the transmission of the new coronavirus from person to person can occur, though many questions about its transmission remain unanswered.

According to the WHO spokespeople who responded to MNT queries, “[r]esearchers are still studying the exact parameters of human-to-human transmission.”

“In Wuhan at the beginning of the outbreak, some people became ill from exposure to a source, most likely an animal, carrying the disease. This has been followed by transmission between people,” they explained, adding:

“As with other coronaviruses, the transmission is through the respiratory route, meaning the virus is concentrated in the airways (nose and lungs) and can pass to another person via droplets from their nose or mouth, for example. We still need more analysis of the epidemiological data to understand the full extent of this transmission and how people are infected.“

In a press briefing from February 6, WHO consultant Dr. Maria Van Kerkhove said that, for now, “[w]e do know that mild individuals shed virus, we know that severe individuals shed virus. […] We know that the more symptoms you have, the more likely you are to transmit.”

However, she said, it is unclear how likely people with mild symptoms are to pass on the infection compared with those with severe symptoms.

In an interview for the JAMA Network — also broadcast on February 6 — Dr. Anthony Fauci, the director of the National Institute of Allergy and Infectious Diseases, said that based on data that they have received from Chinese specialists, the new coronavirus’s “incubation period is probably between 5 and 6 — maybe closer to 5 — days.“

That is, the virus likely takes about 5–6 days to give rise to symptoms once it has infected a person.

Dr. Fauci also said that there had been some anecdotal evidence that people who carry the virus but do not, as yet, present any visible symptoms may still pass it on to others.

However, the likelihood of asymptomatic infection and its possible effect on the outbreak remain unclear.

What are its symptoms?
Like previous coronaviruses, the novel coronavirus causes respiratory disease, and the symptoms affect respiratory health.

According to the Centers for Disease Control and Prevention (CDC), the main symptoms of a 2019-nCoV infection are fever, cough, and shortness of breath.

“Current information suggests that the virus can cause mild, flu-like symptoms, as well as more severe disease. Most patients seem to have mild disease, and about 20% appear to progress to more severe disease, including pneumonia, respiratory failure, and, in some cases, death,” WHO spokespeople told MNT.

In an official WHO Q&A session, Dr. Van Kerkhove explained that as the symptoms of a 2019-nCoV infection can be very generic, it can be difficult to distinguish between them and the symptoms of other respiratory infections.

To understand exactly what a person is dealing with, she said, specialists test viral samples, checking to see whether the virus’s DNA structure matches that of 2019-nCoV or not.

“When someone comes in with a respiratory disease, it’s very difficult — if not impossible — initially to determine what they’re infected with. So, because of this, what we rely on are diagnostics [molecular tests],” said Dr. Van Kerkhove.

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