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COVID-19 in Nigeria: account of epidemiological events, response, management, preventions and lessons learned.

Introduction
After the World Health Organization declared COVID-19 a pandemic, a hand full of cases and deaths have been recorded globally, Nigeria inclusive.


Methods
A retrospective analysis of the COVID-19 weekly disease update report by the Nigeria Centre for Disease Control (NCDC) covering February 29, 2020 (Week 9) and March 28, 2021 (Week 12) was adopted for this study. Data were curated from the NCDC database.


Results
As of March 28, 2021, Nigeria is the 5th most affected African country and the 77th most affected country globally with 162,593 COVID-19 cases and 2,048 COVID-19 related deaths. COVID-19 has been reported in all 36 States and the Federal Capital Territory. However, Lagos has remained the epicenter of the pandemic accounting for 35.4% of the pandemic in Nigeria while Kogi State is the least affected State (0.003%). The trend showed male predilection while the age bracket 35-39 years was the most affected. The attack rate was found to be 78.8 per 100,000 of the population while the cumulative death per 100,000 of the population was found to be 1.0. The case fatality rate was found to be 1.30. Approximately 1,778,105 COVID-19 tests have been performed while 923,623 doses of vaccine have been administered.


Conclusions
COVID-19 has been reported in all states in Nigeria as well as the Federal Capital Territory with many of the cases involving males. The case trend showed a bimodal form indicating a second wave occurrence. Nigeria government has initiated some combative measures as well as vaccine initiation.