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. 2020 Fall;11(Suppl 1):544-550.
doi: 10.22088/cjim.11.0.544.

Epidemiologic comparison of the first and second waves of coronavirus disease in Babol, North of Iran

Seyed Farzad Jalali  1 , Mostafa Ghassemzadeh  2 , Simin Mouodi  3 , Mostafa Javanian  4 , Mehdi Akbari Kani  5 , Reza Ghadimi  3 , Ali Bijani  3
Affiliations

Epidemiologic comparison of the first and second waves of coronavirus disease in Babol, North of Iran

Seyed Farzad Jalali et al. Caspian J Intern Med. 2020 Fall.

Abstract

Background: A few studies compared the epidemiologic features of the first and second waves of coronavirus disease 2019 (COVID-19) outbreak. This research was carried out to compare the 1st and the 2nd waves of the epidemics in the northern Iran.

Methods: In this observational research, demographic, clinical and laboratory characteristics of the patients with COVID-19, admitted to four government hospitals affiliated to Babol University of Medical Sciences during the 1st and the 2nd waves of COVID-19 epidemics have been compared. The period from May 21, 2020 to September 21, 2020 was considered as the second wave of the epidemics while from February 19, 2020 to May 20, 2020, as the first wave of the outbreak in this region.

Results: Out of 6691 total hospitalized cases, 4374 (65.37%), including 1532 (49.6%) people in the first wave and 2842 (78.9%) in the second wave had RT-PCR test for disease confirmation. Among those who were examined with RT-PCR test, 2322 patients (53.1%) including 728 (31.4%) persons in the first wave and 1594 (68.6%) in the second wave were positive for SARS-CoV-2 RNA. 414 (56.9%) of the confirmed cases in the first wave and 767 (48.1%) in the second wave were males (p<0.001). Gastrointestinal symptoms were more incidental in the second wave of the disease. However, severe respiratory conditions were more common during the first wave (p<0.001). Crude mortality rate was lower in the second wave of the outbreak (p<0.001).

Conclusion: Different epidemiologic characteristics were found in the second wave of COVID-19 outbreak in comparison with the first wave of the epidemics in northerrn Iran.

Keywords: Coronavirus; Disease outbreaks; Epidemiology.

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Figures

Figure 1
Figure 1
Distribution of hospitalized patients during the two waves of COVID-19 outbreaks in Babol, North of Iran
Figure 2
Figure 2
Age and sex distribution of patients with confirmed COVID-19 during the two waves of the disease in Babol, North of Iran
Figure 3
Figure 3
Distribution of the improved and expired patients with confirmed COVID-19 during the two waves of the disease, Babol, North of Iran
See this image and copyright information in PMC

References

    1. Ali I. COVID-19: Are we ready for the second wave? Dis Med Public Health Prep . 2020. pp. 1–3. Available at: https://www.cambridge.org/core/journals/disaster-medicine-and-public-hea.... - PMC - PubMed
    1. Abdi M. Coronavirus disease 2019 (COVID-19) outbreak in Iran: Actions and problems. Infect Control Hosp Epidemiol. 2020;41:754–5. - PMC - PubMed
    1. Salimi R, Gomar R, Heshmati B. The COVID-19 outbreak in Iran. J Glob Health. 2020;10:010365. - PMC - PubMed
    1. Javanian M, Bayani M, Shokri M, et al. Clinical and laboratory findings from patients with COVID-19 pneumonia in Babol North of Iran: a retrospective cohort study. Rom J Intern Med. 2020;58:161–7. - PubMed
    1. Strzelecki A. The second worldwide wave of interest in coronavirus since the COVID-19 outbreaks in South Korea, Italy and Iran: A Google Trends study. Brain Behav Immun. 2020;88:950–51. - PMC - PubMed

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