Covid-19 Transmission
As the COVID-19 spreads, from the place of origin, because of the
genetically and structurally relation between SARS COVID-19 and other
viruses from zoonotic animals researchers have revealed that the virus
has transmitted to a human, and then human to human transmission started
(Chan et al. 2020; Del Rio and Malani 2020). the most common way of
infection is transmitted mainly via those respiratory droplets when
ejected at the time of cough, sneezing, and speaking. Close contact is
another most prevalent in the process of virus transmission among the
population (The Chinese Preventive Medicine Association 2020). Despite
that, there may be another way with a high risk like transmission via
fecal-oral transmission, as some laboratory results have recognized the
virus in the stool of some patients from China and the United States
(Holshue et al. 2020). However, whether SARS-CoV-2 can be spread through
aerosols or from mothers to their newborns is yet to be confirmed (Chen,
Guo, et al. 2020; WHO 2020c; Zhu et al. 2020) Although patients
with symptomatic COVID-19 have been the main source of transmission, and
asymptomatic patients and patients in their incubation period are also
carriers of SARS-CoV-2 (Chan et al. 2020; Rothe et al. 2020).because of
this unique feature that COVID-19 has, put researchers in a difficult
situation to find out how to control further spreading the virus, as it
is difficult to identify and quarantine patients before SARS-CoV-2
occupy the whole communities (The Chinese Preventive Medicine
Association 2020).the remaining source of transmission the patients in
the period time of recovering (Rothe et al. 2020).
At the end of the above comparison, we concluded the approximate average
mortality rate among these three infectious diseases around the world,
is showing a very significant difference, as the (figure 5) vividly
illustrates this aspect of the comparison for them. The average
mortality rate for SARS-COVID1 by the division of death rate to the
total infectious cases, that confirmed at the time of outbreak like an
epidemic, the resulting of more than 8,000 with approximately 10%
mortality. As figure 6 depicted that the mortality rate for SARS-COVID1
is much lower than the MERS, but when we compared it with SARS-COVID 19
we get the opposite result, despite that the SARS-COVID19 still on the
ongoing and has occupied the whole world but mortality rates remaining
lower.