Corona and surfaces … the conflicting studies baffle everyone, and experts...

Corona and surfaces … the conflicting studies baffle everyone, and experts...
Corona and surfaces … the conflicting studies baffle everyone, and experts...
Although more than 10 months have passed since the appearance of the Corona virus for the first time in the Chinese city of Wuhan, ambiguity remains surrounding the virus, especially regarding how long it remained active on hard surfaces and the possibility of infection when touching these surfaces.

Since the outbreak of the epidemic last December, studies have conflicted about how long the virus remains active on surfaces, as the results have varied between three to 14 days, but the Australian National Science Agency surprised the world on Monday, and confirmed that the Corona virus can remain on things such as banknotes and phones. Up to 28 days in cold and dry climates.

Scientists at the Australian Research Authority’s Disease Readiness Center tested the ability of the “SARS-Cove 2” virus to persist in the dark and under three different temperatures, according to what the agency reported Monday.

Scientists found that at 20 ° C, SARS-Cove 2 was “extremely strong” on smooth surfaces, such as mobile phones, to live for 28 days on glass, steel and plastic banknotes.

At 30 ° C, its ability to survive decreased to seven days and at 40 ° C to only 24 hours, and the virus remained for less time on porous surfaces, such as cotton (up to 14 days at lower temperatures and less than 16 hours at higher temperatures), according to the researchers. .

But Dr. Yahya Makki, head of the respiratory and cancerous viruses department at the French Medical Institute in Lyon, questioned the validity of this study, and believes that it is difficult for the virus to remain active for so long outside the body on surfaces.

He stressed that such types of corona viruses that are called “enveloping viruses” cannot remain active for more than 3-4 days outside the body, and that they need cells to live on, multiply and develop.

Great conflict

Dr. Jazlah Fadda, a public health specialist, agreed with him to question the validity of this study, and confirmed that the Corona virus is an inanimate organism and therefore it is difficult to remain active throughout this period outside the body, and without a cell that multiplies inside it.

She indicated that there is a great conflict in the studies that determine how long the virus will remain active outside the body, and that many of them need further study and scientific evidence, especially the recent study.

The result of that period was “much longer” than previous studies showed that indicated that the virus can survive up to 14 days on non-porous surfaces, according to the study published in the “Virology Journal”.

According to the World Health Organization, the virus remains active on plastic and stainless steel for 72 hours, on copper for less than 4 hours, and on cardboard for less than 24 hours.

While a Japanese study revealed a few days ago, that the Corona virus may remain active on human skin for 9 hours, which is more than four times the period of time that the virus that causes influenza lives.

The only solution

With the great discrepancy in the results of the studies, Makki believes that the “only solution” to prevent the virus in the absence of a vaccine or treatment for Corona is to wear masks and apply social distancing measures, in addition to washing hands with soap and water every half hour.

He stressed that if these standards are applied, a person can protect himself from infection with the Coronavirus by up to 99%.

As for Fadda, she stressed the need to wash hands and sterilize homes, or surfaces that we will use outside the home to prevent the virus, indicating that this is the best way to prevent infection.

But at the same time, she warned against exaggerating sterilization processes inside the home, stressing that the virus can be easily eliminated at home, but the overuse of sterilizers may lead to weakening of human immunity in the future.

As for when life will return to before the Corona virus, Dr. Makki said, “We may need two years for life to return to normal,” adding that the virus will still exist, but its danger will stop due to obtaining a vaccine, stressing that we are close to finding a vaccine.

He explained that after finding a vaccine, we will need time to confirm its effectiveness and distribute it to the entire population of the year.

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