COVID-19 is an infectious disease caused by the SARS-CoV-2 virus. It mainly spreads when an infected person talks, coughs, or sneezes, releasing saliva or mucus. Symptoms can vary but commonly include fever, cough, fatigue, body aches, and loss of taste or smell. While most cases are mild, some individuals may experience serious complications, particularly older adults and those with underlying health conditions. Preventive measures like wearing masks, practicing good hand hygiene, and getting vaccinated help reduce the spread of the disease and protect people against serious illness.

英語での「Covid-19」の定義と意味

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