What are Viruses?
Viruses are a group of submicroscopic infectious agents that are nonliving, non-motile and contain a RNA or DNA core genetic material,
surrounded by a protein coat.
The invading virus uses the host resources to multiple as it cannot
multiply by itself. The infected host or human in turn mounts two kinds
of responses to fight the virus.
- By forming antibodies to the viral protein also called the Humoral
Immunity. The antibodies neutralize the infectivity of the virus in
the blood and tissues but cannot access the virus inside the cells as
it cannot cross the cell membrane barrier.
- The body forms killer T-cells to destroy the virus-infected cell,
also called the Cellular Immunity. The virus specific Tlymphocyte recognizes and kills virus-infected cell to prevent the
spread of the virus. But, the death of the cells could result in an
inflammatory response which could be damaging to the host.
The body could mount an inadequate or unmeasured response to an
animal virus or a novel virus, which could be self-detrimental
What are Corona Viruses?
Coronaviruses are a family of RNA viruses that cause mild-to-moderate upper respiratory
tract illness like common cold. There are numerous coronaviruses, which circulate
among animals. Sometimes these viruses from animals jump over to humans, called the
spillover event and cause illness in humans, which could be severe.
In the past 2 decades, three Coronaviruses from animals have caused serious and widespread illness in humans. They are:
- SARS coronavirus 1 (SARS-CoV-1) caused severe acute respiratory syndrome
(SARS) in 2002.
- Middle Eastern Respiratory Syndrome (MERS) caused by MERS coronavirus
(MERS-CoV) in 2012
- SARS coronavirus 2 (SARS-CoV-2) emerged from China in December 2019.
The disease caused by SARS CoV-2 virus is called COVID-19.
Symptoms of Corona Virus infection
Symptoms of coronavirus:
- Fever or chills
- Shortness of breath or difficulty breathing
- Muscle or body aches
- Sore throat
- Headache, new fatigue
- Loss of taste or smell
If you have any of these symptoms and think that you could be infected, call your
healthcare provider and explain your symptoms over the phone before going to the
doctor’s office, urgent care facility or emergency room.
In severe cases Covid-19 can lead to respiratory failure, kidney failure and other
If you have a medical emergency, such as shortness of breath, call 911 and seek