Question

what is coronavirus​

Answer 1

Answer:

Coronaviruses are a group of RNA viruses that cause diseases in mammals and birds. In humans and birds, they cause respiratory tract infections that can range from mild to lethal. Mild illnesses in humans include some cases of the common cold (which is also caused by other viruses, predominantly rhinoviruses), while more lethal varieties can cause SARS, MERS, and COVID-19. In cows and pigs they cause diarrhea, while in mice they cause hepatitis and encephalomyelitis. There are as yet no vaccines or antiviral drugs to prevent or treat human coronavirus infections.

Coronaviruses constitute the subfamily Orthocoronavirinae, in the family Coronaviridae, order Nidovirales, and realm Riboviria.[5][4] They are enveloped viruses with a positive-sense single-stranded RNA genome and a nucleocapsid of helical symmetry.[6] The genome size of coronaviruses ranges from approximately 26 to 32 kilobases, one of the largest among RNA viruses.[7] They have characteristic club-shaped spikes that project from their surface, which in electron micrographs create an image reminiscent of the solar corona, from which their name derives.[8]

A coronavirus is a type of common virus that can infect your nose, sinuses, or upper throat. They can spread much like cold viruses. Almost everyone gets a coronavirus infection at least once in their life, most likely as a young child.

Most coronaviruses are not dangerous, but some are. Those that cause Middle East respiratory syndrome (MERS) or severe acute respiratory syndrome (SARS ) can be deadly.

Answer 2

Answer:

COVID-19 is the disease caused by SARS-CoV-2, the coronavirus that emerged in December 2019.

• COVID-19 can be severe, and has caused millions of deaths around the world as well as lasting health problems in some who have survived the illness.
• The coronavirus can be spread from person to person. It is diagnosed with a test.
• The best way to protect yourself is to get vaccinated and boosted when you are eligible, follow testing guidelines, wear a mask, wash your hands and practice physical distancing.