According to NTA this afternoon, it was reported in the news that all Nigerians boarding plane home should be thoroughly tested and if there is anyone with the virus, it must be reported before the plane takes off.
What is a coronavirus?
What is Coronavirus
These viruses have been responsible for several outbreaks around the world, including the severe acute respiratory syndrome (SARS) pandemic of 2002-2003 and the Middle East respiratory syndrome (MERS) outbreak in South Korea in 2015. Most recently, a novel coronavirus (2019-nCoV) triggered an outbreak in China in December 2019, sparking international concern.
While some coronaviruses have caused devastating epidemics, others cause mild to moderate respiratory infections, like the common cold.
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All coronaviruses sport spiky projections on their outer surfaces that resemble the points of a crown, or “corona” in Latin, according to the Centers for Disease Control and Prevention (CDC). Seven known coronaviruses can infect humans, including the novel coronavirus identified in 2019.
Beneath a coronavirus’s pronged exterior lies a round core shrouded in proteins and a “greasy” membrane, Jan Carette, an associate professor of microbiology and immunology at the Stanford University School of Medicine, told Live Science in an email. The core contains genetic material that the virus can inject into vulnerable cells to infect them. So-called spike proteins extend from within the core to the viral surface and allow the virus to “recognize and latch onto” specific cells in the body, Carette said.
“When the spike engages its receptor [on a host cell], a cascade is triggered, resulting in the merger of the virus with the cell,” he added. This merger allows the virus to release its genetic material and hijack the cell’s internal machinery. “Once this happens, the virus sheds its coat and turns the cell into a factory that starts churning out new viruses.”
Coronaviruses can be transmitted between humans through respiratory droplets that infected people expel when they breathe, cough or sneeze. A typical surgical mask cannot block out the viral particles contained in these droplets, but simple measures — such as washing your hands, disinfecting frequently touched surfaces and objects, and avoiding touching your face, eyes and mouth — can greatly lower your risk of infection.
The viruses generally cannot survive for more than a few hours on surfaces outside a human host, but people can pick up a coronavirus from a contaminated surface for a short window of time, Dr. Nancy Messonnier, director of the Center for the National Center for Immunization and Respiratory Diseases, said during a CDC news conference in early 2019. Scientists don’t yet know how long the novel coronavirus can survive outside a host.
In humans, coronaviruses typically cause a respiratory infection with mild to severe flu-like symptoms, but the exact symptoms vary depending on the type of coronavirus.
The four common human coronaviruses can cause people to develop a runny nose, headache, cough, sore throat and fever, according to the CDC. In a subset of individuals, including those with cardiopulmonary disease or a weakened immune system, the viral infection can progress to a more severe lower-respiratory infection such as pneumonia or bronchitis.
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In comparison, severe MERS and SARS infections often progress to pneumonia.