Abstract:BackgroundA serious world problem today is Covid-19 problem with the number of cases continuing to increase. 175 countries have been exposed to COVID-19 in early March 2020 with a transmission rate of 435,493 cases, then an increase of 89.6 million cases with a death toll of 1.93 million in 2021 [1]. Corona Virus Disease-19 has become a non-natural national disaster Positive cases of COVID-19 with the number of confirmed cases reaching 377,541 and patients recovering as many as 301,006 people, while the morta… Show more
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