“Asymptomatic patients only infect, in a small percentage, when they touch and breathe”

A wave of comments has generated the recent statements of the Minister of Health of Peru, Pilar Mazzetti, who argued that People who do not have symptoms do not need to be tested, as they would have a lower risk of transmitting the disease.

“Asymptomatic patients only infect, in a very small percentage, when they touch and when they breathe … How do you get the virus? when I breathe it or because I touch it ”, said the head of Health in an interview with RPP News, after stating that asymptomatic cases of COVID-19 are not contagious.

Read also: After only 3 days of returning to classes: France closes 22 schools due to coronavirus infections

Likewise, the authority said that public health only performs PCR tests on people who have symptoms such as fever, sore throat and general malaise. “Remember that it is not a question of testing everyone, that is not how public health is handled. Tests are done on people who have symptoms. That is written everywhere, not only in Peru “, he pointed.

Response from the ministry

After the controversy unleashed in social networks, the Ministry of Health itself came out to clarify Mazzetti’s sayings through Twitter.

“The asymptomatic infects much less than a person with symptoms, but it is more dangerous because it does not show the disease, it does not take care of itself and we trust ourselves, said the Minister of Health, Pilar Mazzetti”, published the official account of the agency.


“Even asymptomatic people can have serious heart problems,” warns Marc Van Ranst

Din an article, le magazine « Scientific American, writes that in recent weeks the evidence has reinforced the hypothesis that heart damage can occur even in people who have never shown symptoms of the coronavirus. These frightening results help explain why America’s college and professional sports leagues exercise special caution when deciding whether or not to play.

Up to 7% of deaths from Covid-19 could result from myocarditis, according to some reports.

Virologist Marc Van Ranst reacted to the magazine’s analysis on Twitter: “This is one of the good reasons why many virologists choose not to ‘learn to live’ with the virus. Even infected people without symptoms can have serious heart problems ”.

Marc Van Ranst’s heart therefore leans towards a strategy of crushing the infection curve, “until we have a vaccine”.


Studies Find, OTG Corona Is As Contagious as Symptoms

KOMPAS.com – A new study published in JAMA Internal Medicine found that the patient was confirmed Covid-19 but asymptomatic or asymptomatic (used to be called OTG) is just as contagious as a symptomatic patient.

The research team also recommends that asymptomatic cases be isolated to prevent the spread of the virus.

This conclusion was obtained after a research team led by Seungjae Lee from Soonchunhyang University College of Medicine analyzed swab samples from 303 people isolated in Cheonan Antara.

They are 22-36 years old with two-thirds of them being female.

Also read: Beware, More Diabetics With Covid-19 Died

Of the 303 people, 193 were symptomatic (symptomatic) while 110 were asymptomatic (asymptomatic) when their swab samples were taken on March 6-26, 2020.

Then out of 110 people who were initially asymptomatic, 21 people later became symptomatic, while 89 people remained asymptomatic until the end.

During isolation, the participants were sampled for swabs every eight days.

When comparing samples of patients over this duration, the experts found that patients who were completely asymptomatic were positive for Covid-19 up to 17 days or 2.5 days earlier than symptomatic patients.

Also read: Study: The Common Flu Trains Your Immune System To Recognize Covid-19

However, the amount of virus they carry in the nose, throat and lungs is as much as in symptomatic patients.

In addition, the viral load in asymptomatic patients was found to decrease longer than in symptomatic patients.

They were also found to continue releasing the virus (viral shedding) or were still contagious for up to 30 days since they were first confirmed positive for Covid-19.

These findings reinforce the notion that asymptomatic or asymptomatic Covid-19 patients can still transmit Covid-19, although it remains unclear whether the viruses they release are as infectious as the viruses released by symptomatic patients.

Also read: Scientists Find Evidence that Part of the Immune System Can Make Covid-19 worse

The investigators write, little is known about the effectiveness of asymptomatic patients. Our findings however offer plausible biologic possibilities for transmission by asymptomatic people.

“Since spread by asymptomatic patients can be a key factor in community spread, population-based surveillance and isolation of asymptomatic patients may be required,” they added.


Europe endorses the use of masks in asymptomatic in shops or public transport

The European Center for Disease Prevention and Control (ECDC) has endorsed thewearing masks in public, both in people with symptoms thatthey already know that they are infected with Covid-19as in asymptomatic, mainly inclosed and crowded spacess, such as shops, shopping malls or public transport.

“Wearing face masks in public canserve as a means of control to reduce the spread of infection, by minimizing the excretion of respiratory drops from infected individuals who have not yet developed symptoms or who remain asymptomatic, “they detail in a new report, in which, in any case, they point out that” it is not known to what extent the use of masks in the community can help reduce transmission. “

On the type of masks, they guarantee thatyou could use those “made of various textiles”. “Especially if, due to supply problems, priority should be given to medical masks for use as personal protective equipment by health professionals,” they point out.

The EDCD clarifies thatface masks should be used “only as a supplemental measure and not as a substitute”preventive measures such as social distancing, meticulous hand hygiene and avoiding contact with the face, nose, eyes and mouth. “The proper use of masks is essential for the effectiveness of the measure and can be improved through education campaigns,” they emphasize.

Finally, they insist that the recommendations on the use of masks in public “must carefully take into account the lack of scientific evidence, the supply situation and possible negative side effects.”

WHO position

The director general of the World Health Organization (WHO), Tedros Adhanom Ghebreyesus, reiterated last Monday at a press conference that the use of medical masks is only recommended in the general population in the case of sick people or who care for a patient in his house. Thus, he asked that priority be given to access to this type of mask for health professionals in the first line against the coronavirus.

We know they can help protect toilets, but they are rare worldwide. We are concerned that the massive use of masks by the general population may exacerbate the shortage for those who need them most. In some places, this shortage is putting toilets in real danger, “he warned.

The WHO leader explained thatmedical centers continue to recommend the use of medical masks, gloves and other personal protective equipment for healthcare professionals. In the case of the general population, they indicate that they could be used in those countries where other measures against Covid-19 are not available, such as hand cleaning and social distancing, due to the lack of water, for example.

“What is clear is thatthere is limited research in this areaWe encourage countries that are considering the use of face masks for the general population to study their effectiveness so that we can all learn. Most importantly, they should only be used as part of a comprehensive package of interventions, “claimed Tedros.

In addition, the WHO published this Thursday areport on the rational use of personal protective equipment(EPI), in which, among other considerations, it warns that cotton masks can be a potential source of infection, since they are not resistant to fluids and, therefore, can retain moisture and become contaminated.


Important blood test for asymptomatic corona cases

Researchers at the Icahn School of Medicine in New York have developed a blood test that can indicate whether a person has ever been infected with the new corona virus. That reports Technology Review online in “Blood test shows actual coronavirus spread”. The one MedRxiv pre-publication The test described searches for antibodies against Covid-19 in blood samples and thus resembles the most frequently used detection test, for example for HIV.

The test can be used to find out how many people are actually infected or have had contact with the pathogen and are now immune. Because a lot of people get infected, but develop little or no symptoms. On the one hand, knowing their number is important for disease modelers so that their prognoses are more accurate. Governments also urgently need the test to decide how strong foreclosure measures are needed for the population.

The new corona virus has more than worldwide 10,000 people killed. This corresponds to approximately four percent of the 244,600 confirmed cases and results in a shocking mortality rate (as of March 20, 2020). However, the actual mortality rate is certainly lower and possibly much lower. So far, however, epidemiologists have not been able to quantify them precisely. Essentially, the modelers lack the exact denominator of the mortality rate calculation: For this, one divides the number of people who died from the corona virus by the number of all infected.

More on this in Technology Review online in:



‘Silent contagion’ fuels the rapid spread of the coronavirus




Symptom-free, undetected carriers appear to have been most responsible for the rapid spread of the COVID-19 coronavirus outbreak in China. This is assured by a new investigation carried out by researchers from the Columbia University and they have just been published in the magazine « Science».

These findings, based on a mathematical model, explain the rapid geographic spread of the coronavirus in China, the study authors say. And they add that estimating the prevalence and spread of undocumented coronavirus infections is critical to understanding the overall pandemic potential of COVID-19, especially since undocumented infections can cause the virus to reach a much larger number of people. than you think.

To better understand the fraction of undocumented infections that contributed to the China outbreak, scientists developed mathematical model that combined data on people’s movements with reported infection data. They also applied statistical inference techniques.

Estimating the prevalence and spread of undocumented coronavirus infections is critical to understanding the overall pandemic potential of COVID-19

Thus, before the mobility restrictions of January 23, 2020 introduced in Wuhan, 86% of cases of COVID-19 disease were undetected, according to the authors, a finding that has been independently corroborated. Furthermore, these undocumented infections were nearly half as contagious as documented infections, the authors claim, and were the source of two-thirds of infections if diagnosed.

«The explosion of COVID-19 cases in China was largely driven by people with mild or no symptoms who went undetected“Stresses co-author Jeffrey Shaman. “These stealthy transmissions will continue to present a great challenge for containing this outbreak in the future.”

Before the mobility restrictions of January 23, 2020 introduced in Wuhan, 86% of COVID-19 disease cases were undetected

For Shaman it is necessary «increased awareness of the outbreak, maximum use of personal protection measures, and travel restriction that have already helped reduce the overall strength of the infection; however, it is unclear whether this reduction will be sufficient to completely stop the spread of the virus.

The results reveal how government enforcement efforts and 2020 population awareness greatly reduced transmission of the virus. However, they caution that they cannot predict whether this situation will continue once control measures are relaxed, the authors say.

If the new coronavirus follows the pattern of the 2009 pandemic H1N1 flu, it will also spread globally and become the fifth endemic coronavirus in the human population.

The findings, they conclude, underscore the seriousness and pandemic potential of the coronavirus. For example, the 2009 H1N1 pandemic influenza virus also caused many mild cases, spread rapidly throughout the world, and eventually became endemic.

Currently, they recall, there are four endemic strains of coronavirus circulating in human populations (229E, HKU1, NL63, OC43). “If the new coronavirus follows the pattern of the 2009 pandemic H1N1 flu, it will also spread globally and become the fifth endemic coronavirus in the human population.”


asymptomatic people may complicate the fight against the epidemic

While Africa is receiving special attention from the international community, research shows that infected people may not have symptoms.

The African continent, where some health systems are less developed, seems particularly vulnerable.
The African continent, where some health systems are less developed, seems particularly vulnerable. Francis Kokoroko / REUTERS

“We can diagnose the virus everywhere now” and “Effective health systems” were put in place against a new coronavirus epidemic, Ahmed al-Mandhari, WHO regional director, said Wednesday at a press conference in Egypt. Africa is the object of all the care of the international community. Because the continent, of which certain health systems are less developed, seems particularly vulnerable.

The only patient identified on the continent has been tested negative, so he is no longer a carrier of the virus, the Egyptian health ministry said. This does not mean that the continent is rid of the epidemic: on the one hand, said to AFP a WHO official, the patient cannot be officially declared cured until after the fourteen days of quarantine. But above all, Africa is not immune to new contamination …

The countries most at risk are Egypt, Algeria and South Africa. But, good news, they are also the best prepared.

“The management and control of cases imported from Covid-19 is highly dependent on the capacity

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