all about coronavirus in english

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Coronaviruses  are a group of viruses that causes diseas in mammales and birds. In humans, corona viruses cause respiratory tract infections that are typically mild, such as some vauses the common cold ( among other possible causes, predominantly rihnoviruses), through rarer forms can be lethal, such as SARS, MERS, and COVID-19. Sympotems vary in other species: in chickens, they cause upper respiratory tract disease, while in cows and pigs they cause diarrhea.

Disovery of coronavirus :  
Human coronaviruses, first characterized in the 1960s, are responsible for a substantial proportion of upper respiratory tract infections in children. Since 2003, at least 5 new human coronaviruses have been identified, including the severe acute respiratory syndrome coronavirus, which caused significant morbidity and mortality. NL63, representing a group of newly identified group I coronaviruses that includes NL and the New Haven coronavirus, has been identified worldwide. These viruses are associated with both upper and lower respiratory tract disease and are likely common human pathogens. The global distribution of a newly identified group II coronavirus, HKU1, has not yet been established. Coronavirology has advanced significantly in the past few years. The SARS epidemic put the animal coronaviruses in the spotlight.

The history of human coronaviruses began in 1965 when Tyrrell and Bynoe1 found that they could passage a virus named B814. It was found in human embryonic tracheal organ cultures obtained from the respiratory tract of an adult with a common cold. The presence of an infectious agent was demonstrated by inoculating the medium from these cultures intranasally in human volunteers; colds were produced in a significant proportion of subjects, but Tyrrell and Bynoe were unable to grow the agent in tissue culture at that time. At about the same time, Hamre and Procknow2 were able to grow a virus with unusual properties in tissue culture from samples obtained from medical students with colds. Both B814 and Hamre's virus, which she called 229E, were ether-sensitive and therefore presumably required a lipid-containing coat for infectivity, but these 2 viruses were not related to any known myxo- or paramyxoviruses. While working in the laboratory of Robert Chanock at the National Institutes of Health, McIntosh et al3 reported the recovery of multiple strains of ether-sensitive agents from the human respiratory tract by using a technique similar to that of Tyrrell and Bynoe.

HIGHLIGHTS

  • China has suspended all public transport, including flights in and out of Wuhan
  • Wuhan is the epicentre of the coronavirus; 17 deaths have been reported so far
  • India has already issued a travel alert; airports to screen passengers arriving from China

An outbreak of a new coronavirus that began in the central Chinese city of Wuhan has killed 17 and infected nearly 600 people globally.

China has suspended all public transport, including flights in and out of Wuhan, the epicentre of the coronavirus as the confirmed cases climbed to 571 mostly from the city. Global health authorities fear the transmission rate will accelerate as hundreds of millions of Chinese travel at home and abroad during the Lunar New Year holiday.


But how did coronavirus, which is spreading in China and beyond, got its name?

When viewed under a microscope, coronaviruses appear to have a crown-like structure. And in Latin, word 'corona' means 'crown'. This is why the virus is reffered to as coronavirus.

The coronavirus family has many types that affect people. Some cause the common cold while others originating in bats, camels and other animals have evolved into more severe illnesses such as SARS severe acute respiratory syndrome or MERS Middle East respiratory syndrome.

Symptoms of Coronavirus : 

The most common symptoms of COVID-19 are fever, dry cough, and tiredness. Other symptoms that are less common and may affect some patients include aches and pains, nasal congestion, headache, conjunctivitis, sore throat, diarrhea, loss of taste or smell or a rash on skin or discoloration of fingers or toes. These symptoms are usually mild and begin gradually. Some people become infected but only have very mild symptoms.


Most people (about 80%) recover from the disease without needing hospital treatment. Around 1 out of every 5 people who gets COVID-19 becomes seriously ill and develops difficulty breathing. Older people, and those with underlying medical problems like high blood pressure, heart and lung problems, diabetes, or cancer, are at higher risk of developing serious illness.  However, anyone can catch COVID-19 and become seriously ill.  People of all ages who experience fever and/or  cough associated withdifficulty breathing/shortness of breath, chest pain/pressure, or loss of speech or movement should seek medical attention immediately. If possible, it is recommended to call the health care provider or facility first, so the patient can be directed to the right clinic

Prevention of Coronavirus : 

You can reduce your chances of being infected or spreading COVID-19 by taking some simple precautions:

  • Regularly and thoroughly clean your hands with an alcohol-based hand rub or wash them with soap and water. Why? Washing your hands with soap and water or using alcohol-based hand rub kills viruses that may be on your hands.
  • Maintain at least 1 metre (3 feet) distance between yourself and others. Why? When someone coughs, sneezes, or speaks they spray small liquid droplets from their nose or mouth which may contain virus. If you are too close, you can breathe in the droplets, including the COVID-19 virus if the person has the disease.
  • Avoid going to crowded places. Why? Where people come together in crowds, you are more likely to come into close contact with someone that has COVID-19 and it is more difficult to maintain physical distance of 1 metre (3 feet).
  • Avoid touching eyes, nose and mouth. Why? Hands touch many surfaces and can pick up viruses. Once contaminated, hands can transfer the virus to your eyes, nose or mouth. From there, the virus can enter your body and infect you.
  • Make sure you, and the people around you, follow good respiratory hygiene. This means covering your mouth and nose with your bent elbow or tissue when you cough or sneeze. Then dispose of the used tissue immediately and wash your hands. Why? Droplets spread virus. By following good respiratory hygiene, you protect the people around you from viruses such as cold, flu and COVID-19.
  • Stay home and self-isolate even with minor symptoms such as cough, headache, mild fever, until you recover. Have someone bring you supplies. If you need to leave your house, wear a mask to avoid infecting others. Why? Avoiding contact with others will protect them from possible COVID-19 and other viruses.
  • If you have a fever, cough and difficulty breathing, seek medical attention, but call by telephone in advance if possible and follow the directions of your local health authority. Why? National and local authorities will have the most up to date information on the situation in your area. Calling in advance will allow your health care provider to quickly direct you to the right health facility. This will also protect you and help prevent spread of viruses and other infections.
  • Keep up to date on the latest information from trusted sources, such as WHO or your local and national health authorities. Why? Local and national authorities are best placed to advise on what people in your area should be doing to protect themselves

Safe use of Alcohol-based hand sanitizers

To protect yourself and others against COVID-19, clean your hands frequently and thoroughly. Use alcohol-based hand sanitizer or wash your hands with soap and water. If you use an alcohol-based hand sanitizer, make sure you use and store it carefully.

    • Keep alcohol-based hand sanitizers out of children’s reach. Teach them how to apply the sanitizer and monitor its use.
    • Apply a coin-sized amount on your hands. There is no need to use a large amount of the product.
    • Avoid touching your eyes, mouth and nose immediately after using an alcohol-based hand sanitizer, as it can cause irritation.
    • Hand sanitizers recommended to protect against COVID-19 are alcohol-based and therefore can be flammable. Do not use before handling fire or cooking.
    • Under no circumstance, drink or let children swallow an alcohol-based hand sanitizer. It can be poisonous. 
    • Remember that washing your hands with soap and water is also effective against COVID-19. 
Immunity boosting foods :

Eating a healthy diet is very important during the COVID-19 pandemic. What we eat and drink can affect our body’s ability to prevent, fight and recover from infections.

While no foods or dietary supplements can prevent or cure COVID-19 infection, healthy diets are important for supporting immune systems. Good nutrition can also reduce the likelihood of developing other health problems, including obesity, heart disease, diabetes and some types of cancer.

For babies, a healthy diet means exclusive breastfeeding in the first six months, with the introduction of nutritious and safe foods to complement breastmilk from age 6 months to 2 years and beyond. For young children, a healthy and balanced diet is essential for growth and development. For older people, it can help to ensure healthier and more active lives.

Tips for maintaining a healthy diet:

1. Eat a variety of food, including fruits and vegetables

• Every day, eat a mix of wholegrains like wheat, maize and rice, legumes like lentils and beans, plenty of fresh fruit and vegetables , with some foods from animal sources (e.g. meat, fish, eggs and milk).

• Choose wholegrain foods like unprocessed maize, millet, oats, wheat and brown rice when you can; they are rich in valuable fibre and can help you feel full for longer.

• For snacks, choose raw vegetables, fresh fruit, and unsalted nuts.

2. Cut back on salt

• Limit salt intake to 5 grams (equivalent to a teaspoon) a day.

• When cooking and preparing foods, use salt sparingly and reduce use of salty sauces and condiments (like soy sauce, stock or fish sauce).

• If using canned or dried food, choose varieties of vegetables, nuts and fruit, without added salt and sugars.

• Remove the salt shaker from the table, and experiment with fresh or dried herbs and spices for added flavor instead.

• Check the labels on food and choose products with lower sodium .

3. Eat moderate amounts of fats and oils

• Replace butter, ghee and lard with healthier fats like olive, soy, sunflower or corn oil when cooking.

• Choose white meats like poultry and fish which are generally lower in fats than red meat; trim meat of visible fat and limit the consumption of processed meats.

• Select low-fat or reduced-fat versions of milk and dairy products.

• Avoid processed, baked and fried foods that contain industrially produced trans-fat.

• Try steaming or boiling instead of frying food when cooking.

4. Limit sugar intake

• Limit intake of sweets and sugary drinks such as fizzy drinks, fruit juices and juice drinks, liquid and powder concentrates, flavoured water, energy and sports drinks, ready-to-drink tea and coffee and flavoured milk drinks.

• Choose fresh fruits instead of sweet snacks such as cookies, cakes and chocolate. When other dessert options are chosen, ensure that they are low in sugar and consume small portions.

• Avoid giving sugary foods to children. Salt and sugars should not be added to complementary foods given to children under 2 years of age, and should be limited beyond that age.

5. Stay hydrated: Drink enough water

Good hydration is crucial for optimal health. Whenever available and safe for consumption, tap water is the healthiest and cheapest drink. Drinking water instead of sugar-sweetened beverages is a simple way to limit your intake of sugar and excess calories.

6. Avoid hazardous and harmful alcohol use

Alcohol is not a part of a healthy diet. Drinking alcohol does not protect against COVID-19 and can be dangerous. Frequent or excessive alcohol consumption increases your immediate risk of injury, as well as causing longer-term effects like liver damage, cancer, heart disease and mental illness. There is no safe level of alcohol consumption.

7. Breastfeed babies and young children

Breastmilk is the ideal food for infants. It is safe, clean and contains antibodies which help protect against many common childhood illnesses. Babies should be breastfed exclusively during the first 6 months of life, as breast milk provides all the nutrients and fluids they need.

• From 6 months of age, breast milk should be complemented with a variety of adequate, safe and nutrient-dense foods. Breastfeeding should continue under babies at 2 years of age or beyond.

Women with COVID-19 can breastfeed if they wish to do so and should take infection prevention and control measures.

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