What is COVID-19? COVID-19 is a disease caused by the SARS-CoV-2 virus, which was first identified in Wuhan, China, in November 2019. It has now spread globally, leading to a pandemic. The virus can cause symptoms such as fever, cough, tiredness, and shortness of breath. While children and teenagers usually experience mild symptoms, the elderly and those with pre-existing conditions are at higher risk of severe illness. The virus spreads easily through respiratory droplets, so prevention measures like handwashing, maintaining distance, and covering the mouth when coughing or sneezing are important. There is currently no specific treatment or vaccine for SARS-CoV-2. However, research is ongoing to develop effective treatments and vaccines. To prevent the spread of the virus, people should maintain distance, avoid crowded places, wash hands frequently, and wear masks when necessary. The virus primarily affects the lungs, as it uses the ACE-2 receptor to enter cells. Infection can be detected through tests that look for the virus or antibodies. The article also explains how coronaviruses work and the importance of understanding the virus to protect oneself and others. The authors are researchers and professors from the University of São Paulo, and the article was reviewed by young reviewers who emphasize the importance of understanding and preventing the spread of the virus.What is COVID-19? COVID-19 is a disease caused by the SARS-CoV-2 virus, which was first identified in Wuhan, China, in November 2019. It has now spread globally, leading to a pandemic. The virus can cause symptoms such as fever, cough, tiredness, and shortness of breath. While children and teenagers usually experience mild symptoms, the elderly and those with pre-existing conditions are at higher risk of severe illness. The virus spreads easily through respiratory droplets, so prevention measures like handwashing, maintaining distance, and covering the mouth when coughing or sneezing are important. There is currently no specific treatment or vaccine for SARS-CoV-2. However, research is ongoing to develop effective treatments and vaccines. To prevent the spread of the virus, people should maintain distance, avoid crowded places, wash hands frequently, and wear masks when necessary. The virus primarily affects the lungs, as it uses the ACE-2 receptor to enter cells. Infection can be detected through tests that look for the virus or antibodies. The article also explains how coronaviruses work and the importance of understanding the virus to protect oneself and others. The authors are researchers and professors from the University of São Paulo, and the article was reviewed by young reviewers who emphasize the importance of understanding and preventing the spread of the virus.