Can Your Deodorant Cause Dark Underarms? Does poor oral hygiene increase the risk of heart disease? Yellow, Green, Black or Red Vomit: What It Means & What to Do? Five Reasons That Will Make You Fall In Love With Dark Chocolates! Mounjaro vs. Ozempic: Which is Better for Diabetes and Weight Loss? Pneumonia Diet: What to Eat and Avoid in Pneumonia? Omicron appears to be more like a cold for some people, with common reported symptoms including a sore throat, runny nose and a headache. If you have Omicron or any variant of COVID-19, you will likely have symptoms for a couple of weeks. You're contagious from 1-2 days before your symptoms start until 2-3 days after they're... Key points People with COVID-19 have a wide range of symptoms ranging from mild symptoms to severe illness. Symptoms may appear 2-14 days after exposure to the virus. Symptoms may start as mild, and some people will progress to more severe symptoms.