Prevalence in China
Local hospitals in Wuhan, China reported on 31 December 2019 that a
group of cases were infected by corona virus [1] On 9 January 2020
WHO identified the causative agent of these infections as
”2019-nCoV”.[2] At the same date, Huanan seafood market was
identified as the site of elementarily exposure event, then on 1 January
2020 this market was closed and several studies proposed that bats may
be the potential reservoir of SARS-CoV-2, knowing that recently these
bats considered a natural reservoir of MERS-COV and SARS-COV viruses
[3, 4].
On 2 January 2020, 41 patients were admitted to the hospitals as having
laboratory-confirmed COVID-19 infection, less than half of these
patients had hypertension, diabetes and cardiovascular disease. [5]
On 14 February 2020 , Guan WJ et al ; reported the most
commonly method for transmission of COVID-19 in China and it was divided
into: 31.3% of patients travelled to Wuhan recently,72.3% of patients
contacted with people non-residents of Wuhan, and 3.8% of the patients
infected with corona virus were healthcare workers. [6]
All available evidence indicates that corona-virus is transmitted by
cough and vomit droplets of patients and reach to nose, eyes or mouth of
healthy people. However , when heavy droplets had landed on surfaces,
other people may be in close contact with these contaminated surfaces
and touched their mucous membranes. [5, 7]
On 26 March 2020, WHO reported that total confirmed cases in China
reached 81961 and total deaths were 3293 and the transmission
classification of COVID-19 between patients was local transmission
[8]
World Health Organization (WHO) still recommend that we have to wash our
hands frequently, clean and decontaminate surfaces, also keeping the
social distancing of people with fever or respiratory symptoms, which
will limit viral transmission. It also recommendation to use medical
masks for those who deal with COVID-19 patients such as FFP2 or FFP3,
N95 masks. [9]