COVID-19 is caused by a virus called coronavirus that causes upper-respiratory tract illnesses, ranging from the common cold to more severe diseases.
SARS-Cov-2 emerged from Wuhan, China, in December 2019 and was declared a global pandemic by the World Health Organization (WHO). Scientists have been studying the disease and its cause for months now. The analysis of full-length genome sequences obtained from infected patients showed that SARS-CoV-2 is similar to previous coronaviruses SARS or MERS. It uses the same cell entry receptor. The studies have thus confirmed that Covid-19 has evolved from a virus and not bacteria.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19 including symptoms, prevention and available treatment, please refer to the World Health Organisation or your national healthcare authority.