Answer:
where did they occur?
Retrospective investigations by Chinese authorities have identified human cases with onset of symptoms in early December 2019. While some of the earliest known cases had a link to a wholesale food market in Wuhan, some did not.
how did they started ?
What started as an epidemic mainly limited to China has now become a truly global pandemic. There have now been over 5,499,535 confirmed cases and 346,326 deaths, according the John Hopkins University coronavirus dashboard, which collates information from national and international health authorities. The disease has been detected in more than 200 countries and territories, with the US, Brazil and Russia experiencing the most widespread outbreaks, followed by the UK, Spain and Italy. In the UK, there have been 261,184 confirmed cases and 36,914 deaths as of May 25. The true number of infections and deaths is likely to be considerably higher.
How deadly are they?
What the research says
Medically reviewed by Cameron White, MD, MPH on May 4, 2020 New
When is it deadly?
Effects on the body
Mortality rate
vs. the flu and SARS
Summary
Infection with the novel coronavirus can lead to coronavirus disease 19 . This can cause mild to severe symptoms. In some people, it leads to life threatening complications.
This article looks at the mortality rates of Coronavirus and the groups with the highest risk. It also explores what the illness does to the body and how it compares with the flu and severe acute respiratory syndrome (SARS).
All data and statistics are based on publicly available data at the time of publication. Some information may be out of date. Visit our coronavirus hub and follow our live updates page for the most recent information on the coronavirus outbreak.
When is it deadly?
Most people recover from coronavirus without needing hospital treatment.
Image credit: U.S. Navy via Getty Images.
coronavirus can be deadly for some people. Older adults and people with existing health conditions are more at risk of serious complications, which can be life threatening.
According to the World Health Organization (WHO), about 80% of people who develop the disease have mild to moderate symptoms and fully recover without needing treatment in a hospital.
Roughly 1 in 5 people experience serious illness.
Older people may develop more severe symptoms, as may people with ongoing health conditions, such as:
high blood pressure
cardiovascular disease
diabetes
chronic respiratory disease
cancer
Some severe coronavirus symptoms include difficulty breathing and a feeling of pressure in the chest.
coronavirus can also cause serious and sometimes fatal complications, including:
pneumonia
arrhythmia, which is an irregular heartbeat
damage to organs
multiple organ failure
sepsis
shock
respiratory distress syndrome
heart failure
Is there a vaccine?
To date, there are no specific vaccines or medicines for coronavirus. Treatments are under investigation, and will be tested through clinical trials
If you have mild symptoms and are otherwise healthy, self-isolate and contact your medical provider or a Coronavirus information line for advice.
Seek medical care if you have a fever, a cough, and difficulty breathing. Call in advance.
If you feel sick you should rest, drink plenty of fluid, and eat nutritious food. Stay in a separate room from other family members, and use a dedicated bathroom if possible. Clean and disinfect frequently touched surfaces.
Everyone should keep a healthy lifestyle at home. Maintain a healthy diet, sleep, stay active, and make social contact with loved ones through the phone or internet. Children need extra love and attention from adults during difficult times. Keep to regular routines and schedules as much as possible.
It is normal to feel sad, stressed, or confused during a crisis. Talking to people you trust, such as friends and family, can help. If you feel overwhelmed, talk to a health worker or counsellor.