However, the organization of work in these private hospitals was different than in our three private hospitals

However, the organization of work in these private hospitals was different than in our three private hospitals. of HCWs with positive results for the serum IgG antibody test was observed in COVID hospital (28.6 %, 95 %CI: 24.033.6 %) vs. prevalence in the EC (12.6 %, 95 %CI: 10.115.4 %), and in the non-COVID hospital (18.3 %, 95 %CI: 15.226.7 %). The prevalence modified for declared test level of sensitivity and specificity would be 16.8 %; that is 27.4 % in COVID-19 hospital, 10.9 % in EC, and 16.8 % in non-COVID hospital. In multivariate logistic regression analysis, the self-employed predictors for seropositivity were working in COVID-hospital, the occupation of physician, and the presence of the following symptoms: fever, Oxymatrine (Matrine N-oxide) shortness of breath, and anosmia/ageusia. == Conclusions == We found an overall seropositivity rate of 18.3 % and 16.0 % of the modified rate that is higher than seroprevalence acquired in similar studies conducted before vaccinations started. The possibility that individuals in non-COVID dedicated private hospitals might also become infectious, although PCR tested, imposes the need for the use of personal protecting products also in non-COVID medical organizations. Keywords:Healthcare workers, Serology, COVID-19, Hospital, Seroprevalence == Intro == The 1st autochthonous Oxymatrine (Matrine N-oxide) case of COVID-19 was diagnosed on March 6, 2020, in Serbia[1]. During the 1st months following a pandemic, as all countries in the MUC12 region[2], Serbia has confronted problems in implementing proper public health measures in the population, including non-pharmaceutical interventions, as well as protecting health care workers (HCWs) from the disease. Soon after the outbreak was declared on March 19th, the capacities of hospital infectious wards became insufficient to treat several COVID-19 individuals, and the entire private hospitals had to be transformed into private hospitals only for the treatment of COVID-19 individuals. Actually before the epidemic began, all HCWs were educated and qualified on how to securely use personal protecting equipment (PPE) according to the WHO and the ECDC recommendations. The complete products was reserved only for COVID dedicated private hospitals. In non-COVID private hospitals, in addition to the standard medical standard, HCWs used a surgical face mask. Later, in May 2020, when the number of individuals improved enormously, it was recommended to put on a face shield according to the well-known truth that the computer virus is predominantly transmitted by droplets. Illness prevention measures were implemented in all private hospitals with special attention to individuals triage at the hospital admission point in non-COVID private hospitals[3]. Each individual was asked for potential COVID-19 contacts in the family and relatives, whether he traveled anywhere during 14 earlier days and the heat was measured. At that time, the number of PCR checks and laboratory capacities were still limited, while quick antigen checks were Oxymatrine (Matrine N-oxide) not available at all. Therefore, triage at admission to a non-COVID hospital posed a major challenge for both clinicians and illness control physicians. Individuals with suspected illness underwent radiographic examination of the lungs or CT, and in case of characteristic indicators of illness, they were referred to the COVID hospital. Patients having a COVID-19 analysis confirmed in the non-COVID triage hospital as well as individuals with positive PCR test or clinically confirmed COVID-19 in the primary health care center were admitted to the COVID hospital, when necessary. Consequently, all HCWs in the COVID hospital were aware that they treated COVID-19 individuals and wanted to adhere purely to illness prevention and control steps. Unfortunately, some individuals without any sign or sign, during the incubation period, but who could be contagious, might be admitted to a non-COVID hospital[4],[5]. Those individuals posed a threat of illness transmission to additional individuals and the hospital staff. Despite implementing the rigid triage of individuals at admission, a special challenge was health care in emergency centers, because individuals are contagious at least two days before the 1st symptoms of the disease. COVID-19 seroprevalence.