Nation Lingering COVID symptoms are common, new studies find; US passes 700k deaths. Latest COVID-19 updates October 2, 2021Jeanine Santucci and Christine Fernando, USA TODAYComments Off on Lingering COVID symptoms are common, new studies find; US passes 700k deaths. Latest COVID-19 updates Researchers found 37% of 270,000 subjects still had at least one symptom three to six months later, according to an Oxford study. COVID-19 updates.