How many types of human coronaviruses are there, and which ones cause the common cold?Dr. Macias Alert

he Coronavirus It remains a concern, especially during the winter months, because the symptoms can be confused with other respiratory illnesses such as the flu or flu.

infectious disease specialist, Alejandro MaciasKnown as the “flu czar”, he recalled that seven human coronaviruses have been detected so far. Four of these cause the common cold.

He cites publications by Canadian evolutionary and genomic biologists, T. Ryan Gregory, He is also a professor in the Department of Integrative Biology and Genomic Diversity Unit at the Ontario Biodiversity Institute at the University of Guelph.

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Biologists warn There are 7 types of human coronaviruses Specifically, the latest variants are lethal (SARS-CoV, MERS-CoV, SARS-CoV-2) and use the ACE2 receptor. Only one common cold virus (NL63) can do this.

However, he warned that “never in the history of our species have we encountered a situation where a coronavirus infects “billions” of hosts year-round, re-infects several times a year and spreads around the world.” The world through mass media and global travel.”

According to an article published in the magazine national geographic, In its Spanish version, 7 types of coronavirus 4 of these are known and are very common, present in the common cold along with other pathogens (HCoV, HCoV-OC43, HCoV-NL63 and HCoV-HKU1), so it is estimated that a proportion of the population has developed defenses against them and immunized.

In addition to these four variants, three other variants have emerged.The first of which is SARS coronavirus (Severe Acute Respiratory Syndrome) broke out in China in 2002 but has also infected people in 26 other countries in Asia, Europe and the Americas.

But it also appeared Middle East respiratory syndrome coronavirus (Middle East respiratory syndrome coronavirus)Middle East respiratory syndrome) and spread to 27 countries in Africa, Asia, Europe and North America.

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National Geographic Magazine Espara also lists SARS-CoV-2, This resulted in the 2019 pandemic that originated in Wuhan, China. Given its incubation period, this virus has a high rate of human-to-human transmission.

The BBC explained in a YouTube video that symptoms can be very diverse, according to a study conducted by King’s College London called “COVID-19 Symptom Clusters; A Clinical Prediction Tool for Potential COVID-19 Symptom Research Applications.”

The BBC also detailed that researchers analyzed application data from 2,600 patients in the United Kingdom, the United States and Sweden. The results of the study noted that all patients analyzed had two symptoms: loss of smell and headache.

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