In this paper, daily confirmed cases of COVID-19 in different countries are modelled using mathematical regression models. The curve fitting is used as a prediction tool for modeling both past and upcoming coronavirus waves. According to virus spreading average annual temperatures, under study classified into three main categories. First category, the first wave takes about two-year seasons (ab...

middleand high-income countries, although there has been an increase in the number of studies from low-income countries recently. HBV markers measured and definitions of HBV infection varied between studies; 146 studies reported specifically on prevalence of antibodies to HBV core antigen, and 90 reported prevalence of HBV surface antigen. Few papers reported ageor gender-specific prevalence es...

Previous studies indicate that regular consumption of a diet rich in fruits and vegetables is associated with a lower risk for age-related diseases. The aim of the present study was to evaluate whether the often-reported age-related decrease of plasma antioxidants in man depends on differences in dietary intake or on other age- and gender-related factors. In this observational case-control stud...

objectives: the mean age of cigarette smoking has decreased along with an increase in its prevalence, in developing countries. the aim of this systematic review is to determine the prevalence of lifetime, current and daily smoking among middle school students in iran . methods: various search methods have been used in this study including searching different international databanks such as pubm...

OBJECTIVE The prevalence of maternal anaemia remains unacceptably high in developing countries. At the same time, the percentage of women who consume one or more Fe+folic acid (IFA) tablets during pregnancy remains persistently low. The objective of the present study was to identify where, within antenatal care (ANC) programmes, pregnant women falter in obtaining and consuming an ideal minimum ...