Question

write a short note on covid-19 not more than 75 words​

Answer 1

Answer:

Currently the entire world is experiencing the desolation and

devastation of a deadly virus, the new disease of COVID-19,

emerging from the new coronavirus SARS-CoV 2, has spread

throughout the world, affecting more than 200 countries and

hundreds of people, with discouraging morbidity and mortality

figures.

All this started at the end of December 2019, specifically on the

31st, where the Chinese Disease Control Center reported 27

cases of patients with pneumonia of uncertain etiology and who

had in common a Hunan seafood market that it lacked sanitary

measures, warning of a possible zoonosis.

On January 7 its causal agent was identified, which was a

coronavirus and it was called with the name of the new

coronavirus (2019-nCoV). The researchers delimited the 2019-

nCoV sequence with that of other viruses through a database of

genetic sequences, discovering that the most related were two

viruses of Chiroptera origin as indicated by their scientific name

(bats), (bat-SL -CoVZC45 and bat-SLCoVZXC21). However, their

similarities were less than 90%, therefore, it was suggested that

there was the possibility that there was another animal reservoir

that acted as an intermediary between bats and humans. On

February 11, the WHO coined the name SARS-CoV 2 and until

March 11 it was declared by the same entity as a pandemic.

The clinical picture of patients with COVID-19 has a pattern of

respiratory dominance and depends on the tropism of the virus

towards the target organs of the body, because SARSCoV-2 uses

the ACE-2 receptor for its entry into the host cell . The virus binds

ACE-2 with an affinity 10-20 times greater than SARS-CoV. This

receptor is highly expressed in multiple body tissues, including

lung, gastrointestinal, kidney and cardiac tissue, explaining the

symptoms present in the prodrome of the disease.

Explanation:

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Answer 2

Answer:

Coronaviruses are a large family of viruses, including some that cause the common cold to some that cause major diseases such as the Severe Acute Respiratory Syndrome (SARS) and the Middle East Respiratory Syndrome (MERS).



The coronavirus (COVID-19) outbreak came to light when on December 31, 2019, China informed the World Health Organization (WHO) of a cluster of cases of pneumonia of an unknown cause in Wuhan City in Hubei province. On January 9, 2020, the WHO issued a statement saying Chinese researchers have made “preliminary determination” of the virus as a novel coronavirus.