Scientific lessons to be shared for public health actions
The occurrence of SARS-CoV-2 is international public health issue
(40-42), economic (43), and other concerns currently. Since the worlds’
population is terrorized in acquiring SARS-CoV-2, the need decreased to
visit the health institutions; they are being suffered by non-COVID-19
diseases. A press release of the Federal Ministry of Health, Ethiopia,
assuring this fact, in which the ministry of health expressed that the
numbers of patient flow were decreasing. Also, there were privet and
governmental health institutions closed the normal service because of
the COVID-19 pandemic(44). Therefore, with the high transmission rate of
SARS-CoV-2 while asymptomatic raises the public health practitioners
should consider; one thing; serial virologic, serologic data, or a
combination of both in observational cohorts or surveillance systems
studies should be conducted to clarify the magnitude of asymptomatic
infections of SARS-CoV-2. This can be used to compare numbers of
asymptomatic and symptomatic infections; if asymptomatic cases are high
proportion, it enhances disease detecting strategies. Second, if large
proportions of SARS-CoV-2 is from asymptomatic infection, the
effectiveness of public health interventions like physical distancing,
contact tracing, quarantine of different group of populations, which are
aimed to reduce the spread of infection(45) should be quantified.
However, in the presence of different attitudes of people, the culture
of populations, and economic status, it is very difficult to conclude
contact tracing is a perfect prevention measure(36, 46). Therefore, if
the COVID-19 pandemic is found to be ambitious by undetected
asymptomatic SARS-CoV-2 infections, new innovations in disease detection
and prevention may be needed to be introduced in each country. Last but
not the least, knowledge of SARS-CoV-2 immunity among persons with
asymptomatic or symptomatic infection is not still fully or partially
studied. Immunity developed in these persons, how long protective
immunity lasts, and if there will be reinfection, and if there will be
carrier state are not well clarified(47). These types of evidences are
vital for healthcare and other critical infrastructure workers; the
answers to these questions will be decisive to decide relaxing of
community interventions, resuming the normal functions of society,
recovering from the COVID-19 pandemic, then after to make this disease
be history as the previous pandemics.