Noble Coronavirus (Covid-19)
Noble Coronavirus, Nearly one billion people on lockdown as deaths mount (https://www.thenational.ae/international), this now an Main Global Crisis Noble Corona Virus) is an infectious disease caused by a new virus.
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.”
Related: The 9 deadliest viruses on Earth
HOW IT SPREADS
- difficulty breathing (severe cases)
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