Answer:

1.What are coronaviruses?

Coronaviruses are a large family of viruses causing a range of illnesses, from the common cold to more serious infections such as those caused by Middle East Respiratory Syndrome-related Coronavirus (MERS-CoV) and Severe Acute Respiratory Syndrome-related Coronavirus (SARS-CoV). Coronavirus can also cause a variety of diseases in farm animals and domesticated pets.

2. The first known infections from SARS‑CoV‑2 were discovered in Wuhan, China.[17] The original source of viral transmission to humans remains unclear, as does whether the virus became pathogenic before or after the spillover event.[19][75][9] Because many of the early infectees were workers at the Huanan Seafood Market,[76][77] it has been suggested that the virus might have originated from the market.[9][78] However, other research indicates that visitors may have introduced the virus to the market, which then facilitated rapid expansion of the infections.

3. COVID-19 affects different people in different ways. Most infected people will develop mild to moderate illness and recover without hospitalization.

Most common symptoms:

fever

cough

tiredness

loss of taste or smell

Less common symptoms:

sore throat

headache

aches and pains

diarrhoea

a rash on skin, or discolouration of fingers or toes

red or irritated eyes

4. What causes COVID-19?

COVID-19 is caused by infection with the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus strain.

Explanation:

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