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What is Coronavirus – COVID-19
COVID-19 is
a disease
caused by a
new strain of
coronavirus.
'CO' stands
for corona,
'VI' for virus,
and 'D' for
disease.
Formerly, this
disease was
referred to as
'2019 novel
coronavirus'
or '2019-
nCoV;
Human
Coronaviruse
s are
common
throughout
the world
The name
Corona
refers to a
“crown” due
to these
viruses
having
crown-like
spikes on
their surface
The COVID-
19 virus is a
new virus
linked to the
same family
of viruses as
Severe Acute
Respiratory
Syndrome
(SARS) and
some types
of common
cold
COVID-19 is
a completely
new novel
strain;
experts had
not seen this
virus ever
seen before
The 2019–20
coronavirus
pandemic is
an ongoing
pandemic of
coronavirus
disease 2019
(COVID-19)
caused by
severe acute
respiratory
syndrome
coronavirus
2 (SARS-
CoV-2)
What is Coronavirus – COVID-19

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Lesson 1- What is coronavirus

  • 1. What is Coronavirus – COVID-19 COVID-19 is a disease caused by a new strain of coronavirus. 'CO' stands for corona, 'VI' for virus, and 'D' for disease. Formerly, this disease was referred to as '2019 novel coronavirus' or '2019- nCoV; Human Coronaviruse s are common throughout the world The name Corona refers to a “crown” due to these viruses having crown-like spikes on their surface The COVID- 19 virus is a new virus linked to the same family of viruses as Severe Acute Respiratory Syndrome (SARS) and some types of common cold COVID-19 is a completely new novel strain; experts had not seen this virus ever seen before The 2019–20 coronavirus pandemic is an ongoing pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS- CoV-2)
  • 2. What is Coronavirus – COVID-19

Editor's Notes

  1. Coronaviruses are viruses that circulate among animals with some of them also known to infect humans. Bats are considered natural hosts of these viruses yet several other species of animals are also known to act as sources. For instance, Middle East Respiratory Syndrome Coronavirus (MERS-CoV) is transmitted to humans from camels, and Severe Acute Respiratory Syndrome Coronavirus-1 (SARS-CoV-1) is transmitted to humans from civet cats. More information on coronaviruses can be found in the disease background of COVID-19. How does coronavirus spread? While animals are believed to be the original source, the virus spread is now from person to person (human-to-human transmission). There is not enough epidemiological information at this time to determine how easily this virus spreads between people, but it is currently estimated that, on average, one infected person will infect between two and three other people.  The virus seems to be transmitted mainly via small respiratory droplets through sneezing, coughing, or when people interact with each other for some time in close proximity (usually less than one metre). These droplets can then be inhaled, or they can land on surfaces that others may come into contact with, who can then get infected when they touch their nose, mouth or eyes. The virus can survive on different surfaces from several hours (copper, cardboard) up to a few days (plastic and stainless steel). However, the amount of viable virus declines over time and may not always be present in sufficient numbers to cause infection. The incubation period for COVID-19 (i.e. the time between exposure to the virus and onset of symptoms) is currently estimated to be between one and 14 days.  We know that the virus can be transmitted when people who are infected show symptoms such as coughing. There is also some evidence suggesting that transmission can occur from a person that is infected even two days before showing symptoms; however, uncertainties remain about the effect of transmission by asymptomatic persons.