Virus and Corona Virus

Photo-7: Spikes of Corona Virus

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Feature Desk

  • Virus was discovered by Russian botanist Dmitri Iosifovich.
  • Tobacco Mosaic Virus was the first virus discovered.
  • It can survive only inside another living organism, animal or plant.
  • It is a connecting link between living and non-living things.

Living properties of Viruses

  • The presence of DNA or RNA (but never both)
  • Genetic and parasitic properties
  • Capable of spreading the disease Non-living properties
  • The absence of cell and lack of protoplasm
  • No any reproduction and growth outside the living cell
  • The lack of metabolic activities like nutrition, digestion

Structure of Virus

  • Virus has genetic material, either (DNA) Or (RNA).
  • Capsid- protein shell of virus and which protect the nucleic acid and aid in its transmission between host cells.
  • Some viruses have a third structure that surrounds the capsid called the envelope and is composed of a bilipid layer and glycoproteins.
  • Envelope protects the virus from immune system when host secretes anti- virus substances called interferon

How do Viruses work?

What Are Coronavirus?

  • Coronaviruses (CoV) are a large family of viruses that cause illness ranging from the common cold to more severe diseases such as Middle East Respiratory Syndrome (MERSCoV) and Severe Acute Respiratory Syndrome (SARS-CoV).
  • They are a group of viruses that cause respiratory diseases in mammals and birds.
  • The name “coronavirus” is derived from the Latin corona which means crown.

  • Coronaviruses are zoonotic, meaning they are transmitted between animals and people.
  • On February 11, 2020 the World Health Organization announced an official name for the disease i.e. coronavirus disease 2019, abbreviated as COVID-19.
  • First identified in Wuhan China.
  • COVID-19 is a new disease, caused be a novel (or new) coronavirus that has not previously been seen in humans.
  • Virus for COVID-19 is SARS COV-2

How is Coronavirus Diagnosed?

  • Blood tests
  • Throat and nose swabs

Who’s At Risk?

  • Older adults and people with chronic conditions like heart and lung disease
  • people who have recently had surgeries for organ or bone marrow transplants, & patients undergoing chemotherapy.
  • People with weaker or compromised immune systems



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