(Umair Irfan/ Vox) — The list of symptoms of Covid-19 has grown longer and stranger throughout the pandemic. With so many people now vaccinated, the warning signs of an infection have grown more subtle and vague. That’s becoming especially evident as the omicron variant gallops around the world, squeezing through the nooks and crannies in the wall of immunity that’s been built over the past two years.
An international team of researchers has been tracking signs of infection throughout the pandemic with the Covid using a mobile app where users could self-report their symptoms. Data on the omicron variant is still preliminary, but a group of 171 app users in the United Kingdom, most of whom are vaccinated, recently reported that their top symptoms for omicron were a runny nose, headache, fatigue, sneezing, and a sore throat. These were also the top symptoms for people infected with the delta variant. (…)