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Coronavirus Cases Now More Than 2 Million Globally

Coronavirus Nigeria

Coronavirus Nigeria

Coronavirus Nigeria

Coronavirus Nigeria

The number of coronavirus cases all over the world has topped the 2-million mark today, just 4 months after the virus emerged in Wuhan, China.

Over 128,000 people across the globe have died thus far, as per the latest figures from John Hopkins University, while over 500,000 people have recovered from the respiratory illness.

The number of cases keeps growing in nations like US, Spain, Italy, and Germany in recent weeks, with America leading the world with the highest number of COVID-19 cases, 609,000, representing nearly a third of the confirmed patients in the world, according to John Hopkins.

China, which has reported less than 84,000 cases — ended its lockdown of Wuhan in April.

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Coronaviruses are a group of related viruses that cause diseases in mammals and birds. In humans, coronaviruses cause respiratory tract infections that can be mild, such as some cases of the common cold (among other possible causes, predominantly rhinoviruses), and others that can be lethal, such as SARS, MERS, and COVID-19. Symptoms in other species vary: in chickens, they cause an upper respiratory tract disease, while in cows and pigs they cause diarrhea. There are yet to be vaccines or antiviral drugs to prevent or treat human coronavirus infections.

Coronaviruses constitute the subfamily Orthocoronavirinae, in the family Coronaviridae, order Nidovirales, and realm Riboviria. They are enveloped viruses with a positive-sense single-stranded RNA genome and a nucleocapsid of helical symmetry. The genome size of coronaviruses ranges from approximately 27 to 34 kilobases, the largest among known RNA viruses. The name coronavirus is derived from the Latin corona, meaning “crown” or “halo”, which refers to the characteristic appearance reminiscent of a crown or a solar corona around the virions (virus particles) when viewed under two-dimensional transmission electron microscopy, due to the surface covering in club-shaped protein spikes.

Human coronaviruses were first discovered in the late 1960s. The earliest ones discovered were an infectious bronchitis virus in chickens and two in human patients with the common cold (later named human coronavirus 229E and human coronavirus OC43). Other members of this family have since been identified, including SARS-CoV in 2003, HCoV NL63 in 2004, HKU1 in 2005, MERS-CoV in 2012, and SARS-CoV-2 (formerly known as 2019-nCoV) in 2019. Most of these have involved serious respiratory tract infections.


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