First imported case of novel coronavirus reported Feb. 27 in Lagos State, Nigeria. Risk to public remains low. Use basic health precautions.

Severity: Informational Alert

This alert began 28 Feb 2020 03:14 GMT and is scheduled to expire 30 Apr 2020 23:59 GMT.

  • Event: Imported case of coronavirus disease (COVID-19)
  • Location(s): Lagos State (map)
  • Period: February 2020

Summary
Nigerian authorities reported a single imported case of novel coronavirus (COVID-19) late Feb. 27 in Lagos State, representing the first known case of the disease reported in sub-Saharan Africa. The individual is receiving treatment in isolation. Risk to the wider public remains low.

Background and Analysis
Additional cases may be identified in the coming weeks as elevated disease surveillance continues. Older individuals, infants, and those with chronic illness are more susceptible to infection and are at increased risk for severe complications. Human-to-human transmission can occur, though it remains unclear how easily the virus spreads between people. Preliminary investigations indicate the course of illness is not as severe as seasonal influenza, nor as contagious.

Coronavirus disease 2019 (COVID-19) is a viral respiratory disease caused by infection with the SARS-CoV-2 virus (previously known as 2019-nCoV). Symptoms occur 1-14 days following exposure (average of 3-7 days). These symptoms include fever, fatigue, cough, difficulty breathing, sometimes worsening to pneumonia and kidney failure - especially in those with underlying medical conditions.

Advice
Emphasize basic health precautions, especially frequent handwashing with soap and water, or an alcohol-based hand sanitizer if soap and water are unavailable. Practice good coughing/sneezing etiquette (i.e., covering coughs and sneezes with a disposable tissue, maintaining distance from others, and washing hands). There is no evidence that the influenza vaccine, antibiotics, or antiviral medications will prevent this disease, highlighting the importance of diligent basic health precautions.

Resources
WHO advice for international travel

WHO coronavirus knowledge base

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