Virus
classification
Phylum
incertae sedis
Order
Nidovirales
Family
Coronaviridae
Subfamily
Orthocoronavirinae
Species of Alphacoronavirus
Human coronavirus 229E, Human coronavirus NL63, Miniopterus bat coronavirus 1 etc.
Species of Betacoronavirus
Human coronavirus HKU1, Severe
acute respiratory syndrome-related coronavirus (SARS-CoV), Severe acute respiratory syndrome coronavirus
2 (SARS-CoV2), Middle East respiratory syndrome-related coronavirus (MERS) etc.
Species of Gammacoronavirus
Infectious bronchitis virus etc.
Species of deltacoronavirus
Bulbul coronavirus
HKU11 etc.
There are seven strains of human
coronavirus, four strains of which produce the generally mild symptoms of
the common cold:
1. Human coronavirus OC43 (HCoV-OC43)
2. Human coronavirus HKU1
3. Human coronavirus NL63 (HCoV-NL63,
New Haven coronavirus)
4. Human coronavirus 229E (HCoV-229E)
and three strains cause severe symptoms:
1. Middle East respiratory
syndrome-related coronavirus (MERS-CoV), previously known as novel
coronavirus 2012 and HCoV-EMC
2. Severe acute respiratory syndrome
coronavirus (SARS-CoV or "SARS-classic")
3. Severe acute respiratory syndrome
coronavirus 2 (SARS-CoV-2), previously known as 2019-nCoV or "novel
coronavirus 2019"
Some interesting
facts about SARS-CoV2:
·
Previously it was known as 2019 novel coronavirus (2019-nCoV)
·
SARS-CoV2 is
responsible for pandemic COVID-19
·
Outbreak of
SARS-CoV2 is declared as pandemic by WHO on March 11, 2020.
·
It is the seventh known coronavirus to infect people, after 229E, NL63, OC43, HKU1, MERS-CoV,
and the original SARS-CoV.
·
Its transmission
occurs by respiratory droplets like cough and sneeze within the range of 2 metre.
·
Size of
SARS-CoV2 is 50-200nm in diameter.
·
SARS-CoV-2 has four structural proteins, known as the S
(spike), E (envelope), M (membrane), and N (nucleocapsid) proteins; the N protein holds the RNA genome, and
the S, E, and M proteins together create the viral envelope.
·
Spike protein is responsible for attachment of virus to host
membrane.
·
Genome of
SARS-CoV2 is positive-sense single-stranded RNA (+ssRNA).
·
Its genome is of 30kb length.
·
SARS-CoV2 bind with angiotensin converting enzyme2 (ACE2)
receptors of human cells and enter into cells.
COVID-19
Update (till March 22, 2020 at 7:00 PM IST)
Total Coronavirus Cases: 317,298
Deaths:13,642
Recovered: 95,949
|
Active
cases
|
Closed
cases
|
||
|
207,707
Currently Infected Patients
|
109,591
Cases which had an outcome:
|
||
|
197,565 (95%)
in Mild Condition
|
10,142 (5%)
Serious or Critical
|
95,949 (88%)
Recovered / Discharged
|
3,642 (12%)
Deaths
|
COVID-19 Update (till March 22, 2020 at 5:30 AM IST)
|
Total
cases
|
New
cases
|
Total
deaths
|
New
deaths
|
Total
recovered
|
Active
cases
|
Serious,
critical
|
Total
cases/1M population
|
|
360
|
28
|
7
|
2
|
24
|
329
|
|
0.3
|
Outbreak of Coronavirus related
diseases
|
Outbreak
|
Virus
|
|
SARS, 2003
|
SARS-CoV
|
|
MERS, 2012
|
MERS-CoV
|
|
MERS, 2015
|
MERS-CoV
|
|
MERS, 2018
|
MERS-CoV
|
|
COVID-!9
|
SARS-CoV2
|
