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Ten good news about coronavirus

We are undoubtedly suffering from a pandemic of fear. For the first time in history we are experiencing the evolution of an epidemic in real time. But not everything is bad news.

by
  • Ignacio López-Goñi
    Ignacio López-Goñi,
  • ignaciolopez
    ignaciolopez
March 4, 2020
in Echoes
0
A health worker with protective clothing adjusts his glasses before moving patients in Daegu, South Korea, on Sunday, March 1, 2020. Photo: Ryu Young-seok/Yonhap via AP.

A health worker with protective clothing adjusts his glasses before moving patients in Daegu, South Korea, on Sunday, March 1, 2020. Photo: Ryu Young-seok/Yonhap via AP.

Whether we classify the new coronavirus as a pandemic or not, the issue is serious. Its importance should not be minimized. In less than two months it has spread over several continents, but the virus doesn’t care what we call it. A pandemic implies a sustained, effective, continuous and simultaneous transmission of the disease in more than three different geographical regions. We may already be in that phase, but that is not synonymous with death, since the term does not refer to the lethality of the pathogen but to its transmissibility and geographical extension.

We are undoubted suffering from a pandemic of fear. For the first time in history we are experiencing the evolution of an epidemic in real time: all the media, several times a day, every day, all over the planet, talk about the coronavirus. We follow live each case one by one. It has even been front-page news that in Brazil the virus has mutated three times!

I insist: the issue is serious, but one of the first victims of the coronavirus in Spain has been the Ibex35. You have to report what is happening, but we also need good news. Here are ten of them.

  1. We know what it is

The first cases of AIDS were described in June 1981 and it took more than two years to identify the virus causing the disease. The first cases of severe pneumonia were reported in China on December 31, 2019 and by January 7 the virus had already been identified.

The genome was available on day 10. We already know that it is a new coronavirus of the group 2B, from the same family as SARS, which is why we have called it SARSCoV2. The disease is called COVID19.

It is related to coronavirus of bats. Genetic analyzes confirm that it has a recent natural origin (between the end of November and the beginning of December) and that, although viruses live by mutating, their frequency of mutation is not very high.

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  1. We know how to detect it

A RT-PCR test to detect the virus has been available to everyone as of January 13.

In recent months, these types of tests have been perfected and their sensitivity and specificity evaluated.

  1. In China the situation is improving

The strong control and isolation measures imposed by China are paying off. For several weeks now, the number of diagnosed cases decreases every day.

#CoronaVirusUpdate

Del total de casos en hospital, los sospechosos han bajado a ser sólo el 2.4% y la cantidad (36,271) ha disminuido a ser prácticamente la mitad del máximo del 8 de febrero (66,193). pic.twitter.com/Q4NxsV63av

— Alfonso Araujo (@Alf_ArGzz) March 1, 2020

In other countries a very detailed epidemiological follow-up is being carried out. The foci are very concrete, which can allow them to be controlled more easily. For example, in South Korea and Singapore .

  1. 80% of cases are mild

The disease causes no symptoms or is mild in 81% of cases. In the remaining 14% it can cause severe pneumonia and in 5% it can become critical or even fatal.

  1. People get well

The only data that are sometimes shown in the media are the increase in the number of confirmed cases and the number of deaths, but the majority of infected people are cured. There are 13 times more cured patients than deceased, and the proportion is increasing.

Recovered per day. Coronavirus COVID-19 Global Cases by Johns Hopkins CSSE
  1. It (almost) doesn’t affect minors

Only 3% of cases occur in children under 20, and mortality in people under 40 is only 0.2 %. In children the symptoms are so mild that it can go unnoticed.

  1. The virus is easily inactivated

The virus can be effectively inactivated from the surfaces with a solution of ethanol (62-71% alcohol), hydrogen peroxide (0.5% hydrogen peroxide) or sodium hypochlorite (0.1% bleach), in just one minute.

Frequent handwashing with soap and water is the most effective way to avoid contagion.

  1. There are already more than 150 scientific articles

It is the time of science and cooperation. In just over a month, 164 articles can already be consulted in PubMed on COVID19 or SARSCov2, in addition to many others available in servers that have not yet been reviewed by peers (pre-prints). They are preliminary works on vaccines, treatments, epidemiology, genetics and phylogeny, diagnosis and clinical aspects.

These articles are written by about 700 authors scattered throughout the planet. It is science in common, shared and open. In 2003, when the SARS happened, it took more than a year to obtain less than half of the articles.

In addition, most scientific journals have left their funds on coronaviruses open.

Paramedics work inside a tent erected outside a hospital in Cremona, Italy, on Saturday, February 29, 2020. Photo: Claudio Furlan/Lapresse via AP.
  1. There are already prototypes of vaccines

Our ability to design new vaccines is spectacular. There are already more than eight projects against the new coronavirus. There are groups that work on vaccine projects against other similar viruses and now try to change viruses.

What can lengthen its development are all the necessary tests on toxicity, side effects, safety, immunogenicity and effectiveness in protection. That is why there is talk of several months or years, but some prototypes are already underway.

For example, the mRNA-1273 vaccine from the Moderna company consists of a messenger RNA fragment that encodes a protein derived from the glycoprotein S of the coronavirus surface. This company has similar prototypes for other viruses.

Inovio Pharmaceuticals has announced a synthetic DNA vaccine for the new coronavirus, INO-4800, also based on the S gene of the virus surface. For its part, Sanofi will use its recombinant baculovirus expression platform to produce large amounts of the surface antigen of the new coronavirus.

The vaccine group of the University of Queensland, in Australia, has announced that it is already working on a prototype using the technique called molecular clamp, a novel technology that consists in creating chimeric molecules capable of maintaining the original tridimensional structure of the viral antigen. This allows for the production of vaccines using the genome of the virus in record time.

Novavax is another biotechnology company that has announced its work with the coronavirus. It has a technology to produce recombinant proteins that are assembled into nanoparticles and that, with their own adjuvant, are potent immunogens.

In Spain it is the group of Luis Enjuanes and Isabel Sola of the CNB-CSIC who have been working on vaccines against coronaviruses for years.

Some of these prototypes will soon be tested in humans.

  1. There are more than 80 clinical trials with antivirals in progress

Vaccines are preventative. More important are the possible treatments of people who are already sick. There are already more than 80 clinical trials to analyze coronavirus treatments. These are antivirals that have been used for other infections, which are already approved and that we know are safe.

One of those that has already been tested in humans is remdesivir, a broad-spectrum antiviral, still under study, which has been tested against Ebola and SARS/MERS. It is an analogue of adenosine that is incorporated into the viral RNA chain and inhibits its replication.

Another candidate is chloroquine, an antimalarial that also has potent antiviral activity. It is known to block the infection by increasing the pH of the endosome that is needed for the fusion of the virus with the cell, which inhibits its entry. It has been proven that this compound blocks the new coronavirus in vitro and is already being used in patients who have pneumonia caused by the virus.

Lopinavir and Ritonavir are two protease inhibitors used as antiretroviral therapy that inhibit the final maturation of the AIDS virus. As the SARSCov2 protease has been shown to be similar to that of HIV, this combination has already been tested in patients with coronavirus.

Other proposed trials are based on the use of oseltamivir (a neuraminidase inhibitor used against influenza virus), interferon-1b ​​(protein with antiviral function), antisera from already recovered people and monoclonal antibodies to neutralize the virus. Even new therapies with inhibitory substances, such as baricitinibin, selected through artificial intelligence, have been suggested.

The 1918 flu pandemic caused more than 25 million deaths in less than 25 weeks. Could something similar happen again today? As we see, most likely not. We have never been better prepared to fight a pandemic.

* This text was originally published in The Conversation, under a Creative Commons license.

  • Ignacio López-Goñi
    Ignacio López-Goñi,
  • ignaciolopez
    ignaciolopez
Tags: coronavirus
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Ignacio López-Goñi

Ignacio López-Goñi

Catedrático de Microbiología, Universidad de Navarra. Doctor en Biología por la Universidad de Navarra (1989) Durante varios años fue investigador del Instituto Nacional de Investigaciones Agrarias (INIA) en los Departamentos de Biología Molecular y Celular de la Universidad de Berkeley (California, EE.UU.) y de Microbiología Molecular de la Universidad de Columbia (Missouri, EE.UU.) Desde agosto de 1992 se incorporó como Profesor en el Departamento de Microbiología y Parasitología de la Universidad de Navarra. Durante 2005-2014 fue Decano de la Facultad de Ciencias de la Universidad de Navarra.En 2016 recibió el premio Tesla de divulgación científica, y en 2017 el premio ASEBIO 2017 de Comunicación y Divulgación de la Biotecnología, en la Categoría prensa digital y nuevos medios.

ignaciolopez

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