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Causes

The recent outbreak began in Wuhan , a city in the Hubei province of china.  Reports of first COVID-19 cases  started in  December 2019.

Coranaviruses  are common in certain species of animals, such as cattle and camels. Although  the transmission of coronaviruses from animals to human is rare, this new certain likely came from bats, though one study suggests pangolins may be the origin .

However,  it remains unclear exactly how the virus first spread to humans.

Some reports trace the earliest cases back to a seafood and animals market in Wuhan.  It may have been from here that  SARS-COV-2 started to spread to humans.

SARS-COV-2  spread  from person to person through close communities.

When people with COVID-19 breathe  out  or cough, they expel tiny droplets that contain virus. These droplets can enter the mouth or nose of someone without the virus, causing an infection to occur.

The most common that this illness spreads is through close contact with someone who has the infection . Close contact is within around 6 feet.

Symptoms

The main symptoms include:

  • Fever
  • Coughing
  • shortness of breath
  • Trouble of breathing
  • Fatigue
  • Chills, sometimes with shaking
  • Body aches
  • Headache
  • Sore throat
  • Congestion/runny nose
  • Loss of smell or taste
  • Nausea
  • Diarrhea

The severity of COVID-19 symptoms can range from very mild to severe. Some people may have only a few symptoms, and some people have no symptoms at all.  Some people may experience worsened symptoms, such as worsened shortness of breath and pneumonia, about a week after symptoms start.

Prevention

Although there is no vaccine available to prevent COVID-19, you can take steps to reduce your risk of infection. WHO and CDC recommended following  these precautions for avoiding COVID-19:

  • Avoid close contact (within about 6 feet or 2 meters) with anyone who is sick or has symptoms.
  • Avoid large events and mass gatherings.
  • Wash your hands often with soap and water for at least 20 seconds , or use an alcohol -based hand sanitizer that contains at least 60% alcohol.
  • Stay home as much as possible and keep distance between yourself and others (within about 6 feet or 2 meters), especially if you have a higher risk of serious illness . Keep in mind some people may have COVID -19 and spread it to others even if they don’t have symptoms or don’t know they have COVID-19.
  • Cover your mouth and nose with your elbow or a tissue when you cough or sneeze. Throw away the used tissue. Wash your hands right away.
  • Cover your face with a cloth face mask in public spaces, such as the grocery store, where it’s difficult to avoid close contact with others, especially if you are in an area with ongoing community spread. Only use nonmedical cloth masks – surgical masks and N95 respirators should be reserved for health care providers.
  • Avoid sharing dishes, glasses , towels, bedding and other household items if you’re sick.
  • Avoid touching your eyes, nose and mouth.
  • Clean and disinfect high- touch surfaces , such as doorknobs, light switches, electronics and counters, daily.

Stay home from work, school and public areas if you’re sick, unless  you’re going to get medical care. Avoid public transportation, taxis and ride- sharing if you’re sick.