While concentrations of the virus were highest in ICU wards, general wards (even those not treating coronavirus patients) showed positive testing results too. Researches said compared to floor samples of other viruses, the rate of positivity for COVID-19 was relatively high. Half of the samples from the soles of the ICU medical staff shoes tested positive. As a result, researchers concluded the soles of medical staff shoes might function as carriers. For the latest studies and developments in the coronavirus pandemic, sign up for our daily coronavirus newsletter.