Which virus causes COVID-19?
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SARS-CoV-2
It belongs to the family of coronaviruses.
๐ก Did you know? The name alludes to its crown-like envelope.
17 questions ยท History
The COVID-19 pandemic was the first global epidemic of the internet age and, from 2020 on, changed the lives of billions of people. The illness is caused by the coronavirus SARS-CoV-2, first noticed in late 2019 in the Chinese city of Wuhan. The pathogen spread rapidly around the world through the air; on 11 March 2020 the World Health Organization (WHO) officially declared a pandemic. To slow the spread, governments imposed unprecedented measures: lockdowns, closed schools and shops, mask mandates, distancing rules and working from home. In Germany the Robert Koch Institute coordinated the response. The disease ranges from symptomless through flu-like courses to severe pneumonia; typical are fever, cough and a temporary loss of taste and smell. The elderly and those with prior illness were especially at risk. In record time researchers developed vaccines, including the first ever approved mRNA vaccines from BioNTech/Pfizer and Moderna. The virus kept changing; variants such as Delta and Omicron triggered new waves. The pandemic claimed millions of lives worldwide, overwhelmed health systems and left deep marks on the economy, education and society.
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SARS-CoV-2
It belongs to the family of coronaviruses.
๐ก Did you know? The name alludes to its crown-like envelope.
Wuhan
In late 2019 unusual pneumonias mounted up there.
๐ก Did you know? A wildlife market fell under early suspicion.
2020
This happened on 11 March 2020.
๐ก Did you know? Within weeks the world stood still.
The WHO
The World Health Organization is based in Geneva.
๐ก Did you know? It coordinates global health policy.
Lockdown
Schools, shops and borders were closed.
๐ก Did you know? Many people worked from home.
mRNA vaccines
BioNTech/Pfizer and Moderna developed them.
๐ก Did you know? The BioNTech researchers later won the Nobel Prize.
Taste and smell
This loss was seen as a typical sign.
๐ก Did you know? In some it lasted for weeks.
The face mask
Mask mandates applied in many places.
๐ก Did you know? FFP2 masks filter especially many particles.
The Robert Koch Institute
It gathered case numbers and issued recommendations.
๐ก Did you know? It is named after the bacteriologist Robert Koch.
Distancing rule
In Germany it was usually 1.5 metres.
๐ก Did you know? This was to avoid droplet infections.
Omicron
It was highly contagious but often milder.
๐ก Did you know? Before it, the Delta variant had driven the waves.
The elderly and those with prior illness
Care homes were especially affected.
๐ก Did you know? Vaccination was recommended for them first.
Long COVID
Typical are fatigue and trouble concentrating.
๐ก Did you know? Research into it continues today.
The PCR test
It detects the virus's genetic material.
๐ก Did you know? Rapid tests were simpler but less accurate.
The reproduction number (R value)
Below 1, a wave subsides.
๐ก Did you know? It became an everyday term.
The Tokyo Olympic Games
They took place only in 2021, without spectators.
๐ก Did you know? It was the first peacetime postponement of the Games.
Several million
Officially over seven million deaths were reported.
๐ก Did you know? The true toll is probably much higher.
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