When and Where COVID-19 (Corona-virus), was first discovered ?

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The epidemic and outburst of Novel Coronavirus disease (COVID-19) was originally found in a sea-food market in Wuhan city in Hubei province of China in mid December 2019 and now outspread and extended to 215 countries/states/provinces/cities/small-towns/rural & urban areas of the World-Wide. It was first isolated from three people with pneumonia inter-connected and related to the groups of the acute respiratory illness, spread in Wuhan. All structured characteristics of the novel SARS-CoV-2 virus particle found in related Coronaviruses in nature. It's known as ongoing pandemic since 2019.

The thousands of SARS-CoV-2 variants are clustered into either clades or lineages. The WHO (World Health Organization), in discussions with partners, expert networks, national authorities, institutions and researchers, have recognized nomenclature systems for naming and tracking SARS-CoV-2 genetic lineages by GISAID, Nextstrain and Pango.

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The emigration of inhabitants of Wuhan led to additional confirmed cases and was associated with an increased morality rate throughout Hubei province. Human-to-Human transmission of SARS-CoV-2 among close contacts were confirmed and spread through virus (small enough not to be seen with naked eyes) not with any bacteria or other micro-organisms. 

Avoiding crowded indoors spaces and ventilation in Corona virus (COVID-19)

The CDC recommends that crowded indoors spaces should be avoided. When indoors, increasing the rate of air change, decreasing recirculation of air and increasing the use of outdoor air can reduce transmission. The WHO recommends ventilation and air filtration in public spaces to help clear out infectious aerosols.

Exhaled respiratory particles can build-up with enclosed spaces with inadequate ventilation. The risk of  COVID-19 infection increases especially in spaces where people engaged in physical exertion and raise their voice. For example : Exercising, Singing & Shouting as this increases exhalation of respiratory droplets. Prolonged exposure to these conditions, typically more than 15 minutes, leads to higher risk of infection.

...... with this there is an end of our topic.. 😜 😜 😜

FIRST WAVE - Spanish Flu

The pandemic is conventionally marked as having begun on 4th march, 1918. The first wave of the Flu lasted from the first quarter of 1918 was relatively mild. Morality rates were not appreciably above normal; in the United States ~75,000 flu-related deaths were reported in the first six months of 1918 as compared to ~63,000 deaths during the same period in 1915. In Madrid, Spain fewer than 1,000 people died from influenza between May and June 1918. There were no reported quarantines during the first quarter of 1918. However the first wave spread a significant disruption in the military operation of World War 1, with three quarters of French troops, half the British forces, and over 9,00,000 German soldiers sick. 

.......we'll discuss 2nd wave of spanich Flu in next article

BLACK DEATH

In human history, there have been number of pandemics of diseases such as small-pox; the most deadly, tragic and incurable pandemic experienced in history/ancient time, was the "Black death" (was known for plaque), which was killed 75-200 million people worldwide in 14th century. It was caused by the bacterium yersinia pesttis and may also caused by septicaemic or pneumonia plaques. 

It was the origination of the second plaque pandemic. The plaque spread social, religious and economic upheavals, with increasing and expanding influence on the course of European history. This pandemic originated either in Central-Asia or East-Asia, but it's first appearance was seen in Crimea in 1347; it was most likely carried by fleas living on the black rats on Genoese slave ships spreading through Mediterranean Basin reaching Africa, Western-Asia and the rest of Europe via.

The black death was the most great natural disaster to strike Europe during the late middle ages (the first was being the Great Famine of 1315-1317) and is estimated to have killed approximately 30 percent to 60 percent of European population. The plaque also might have reduced the World's population approximately 475 million to 350-375 million in the 14th century.

Description/Explanation of Black death/Plaque :

It was identified and sanctioned that an epidemiological account of plaque is as predominant as an recognization of symptoms, but researchers are hampered by the lack of reliable statistics from the period. Archaeologist Barney Sloane argued that there is insufficient evidences and proofs of the extinction of numerous rats in the Archaeological records of the medieval waterfront in London and the disease spread too quickly to support the thesis that Y. Pestis was spread from fleas on rats; he argued that transmission must have been from person to person.  This theory is reported by research in 2018 which suggested transmission was more likely by body lice and fleas during the second plaque pandemic.

SUMMARY :

With past experience & evidences, intellectual discussion and argumentation, no single evidences has achieved any solution; World-Wide accepted.

......At the end, Finally & Eventually, "Plaque is plaque." 😉 😜 😜

PANDEMIC DISEASE

A Pandemic disease is an epidemic, infestation or outbreak of infectious, toxic and communicable disease that spread and expand across a enormous area, for instance numerous continents, internationally and globally affecting a considerable and significant number of people. This globally endemic disease with a stable number of infected people is not a pandemic. 

In human history, there have been number of pandemics of diseases such as small-pox; the most deadly, tragic and incurable pandemic experienced in history/ancient time, was the "Black death" (was known for plaque), which was killed 75-200 million people worldwide in 14th century. It was caused by the bacterium yersinia pesttis and may also caused by septicaemic or pneumonia plaques. 

In 1918, a pandemic which affected the people worldwide, a Spanish Flu, also known as the Great influenza epidemic or 1918 influenza pandemic, was exceptionally deadly life-threatening universally influenza pandemic caused by H1N1 influenza virus. The premature cases was found in France, Germany and United kingdom in April. After 2 years, approximately, two-third of population around 500 million world-wide infected, was infected in four successive waves.

Contemporarily, pandemics include Tuberculosis, HIV/AIDS & COVID-19. 

Coronavirus disease 2019 (COVID-19) is deadly epidemic disease spread by severe acute respiratory syndrome coronavirus 2(SARS-COV 2). It's mainland, engendered and implanted found in Wuhan, China, December 2019. This disease has since caused globally and internationally, leading to ongoing pandemic - it's about to 3rd wave come.

Human immunodeficiency virus infection and acquired immunodeficiency syndrome (HIV/AIDS) is a range and stretch of condition caused by infection with the human immunodeficiency virus (HIV), a retrovirus. These symptoms may be experienced or notices by earlier stage or may suffer a brief period of influenza-like symptoms.

Tuberculosis (TB), is a infectious disease generally caused by Mycobacterium tuberculosis (MTB) bacteria. It mainly affects the lungs or may influence other parts of the body.

.......in next articles, we'll discuss in details on theses topics.... 😋 😋 😋