COVID-19 is an infectious illness caused by the SARS-CoV-2 virus. It began spreading globally in January 2020, leading to the COVID-19 pandemic.
COVID-19 symptoms can differ from person to person, but commonly include fever, tiredness, cough, and trouble breathing. Loss of smell or taste is also frequently reported. Symptoms usually appear between 1 and 14 days after being exposed to the virus. Around a third of people who get infected don’t experience any noticeable symptoms. Of those who do, most (81%) have mild to moderate symptoms, like a mild form of pneumonia. Fewer people (14%) develop severe symptoms such as shortness of breath or significant lung problems, and a small percentage (5%) become critically ill, potentially experiencing respiratory failure or organ damage. Older adults are more likely to develop severe illness, and complications can sometimes be fatal. Many people continue to experience health problems for months or even years after their initial infection—known as long COVID—and studies are ongoing to understand the long-term effects and potential organ damage.
COVID-19 spreads when you breathe in virus particles or they get into your eyes, nose, or mouth. The risk is greatest when you’re close to someone who’s infected, but the virus can also travel through the air, especially indoors, on tiny particles that stay suspended. You can also get sick by touching surfaces with the virus on them and then touching your eyes, nose, or mouth. People can spread the virus for up to 20 days, even if they don’t feel sick.
So, when I needed to get tested for COVID, they used a few different methods to see if I had the virus. Basically, they took a swab from my nose and then used things like RT-PCR, another one called transcription-mediated amplification, and RT-LAMP. These all look for the virus’s genetic material to confirm if I was infected.
COVID-19 vaccines are now available and being used in many countries, with widespread vaccination efforts underway. Alongside vaccines, people are encouraged to practice preventive measures like social distancing, staying home when sick, improving ventilation, wearing masks, covering coughs and sneezes, and frequent hand washing. Although some antiviral drugs exist, treatment for COVID-19 mainly focuses on relieving symptoms and providing supportive care, along with isolation and, in some cases, experimental therapies.
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2026-05-29 11:43