How Western University’s largest COVID-19 cluster happened Grachnik said the company is in contact with local public health and recently conducted a deep cleaning.He added that Walmart will continue to take measures to support the well-being of both customers and associates.[ Sign up for our Health IQ newsletter for the latest coronavirus updates ]To keep people safe Grachnik said the company has increased cleaning throughout the store, is checking the temperature of all associates at the start of each shift, is limiting the number of people in the store, and is cleaning shopping carts.This news comes after the Middlesex London Health Unit reported an outbreak of COVID-19 among 28 Western University students and the largest single-day.