write short note on corona.
Answers
Answer:
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Explanation:
Corona is a luminous envelope of plasma that surrounds the Sun and other celestial bodies. It is extended to millions of kilometres into space and is commonly seen during a total solar eclipse. The intense temperature of the Sun's corona is due to the presence of highly ionized ions which give it a spectral feature.
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Answer:
Coronaviruses are large group of viruses that cause illness in humans and animals. Rarely, animal coronaviruses can evolve and infect people and then spread between people such as has been seen with MERS and SARS.
Although most human coronavirus infections are mild, the epidemics of the severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East respiratory syndrome coronavirus (MERS-CoV), have caused more than 10,000 cumulative cases in the past two decades, with mortality rates of 10% for SARS-CoV.