Within the week following the initial UK infections, four further vaccinated horses tested positive for equine flu in stables in Newmarket, but after six days the BHA declared that (with stricter rules regarding vaccinations) racing would resume. While some in the industry welcomed the resumption of racing, Dr Richard Newton, of the Animal Health Trust warned that British racing is "not out of the woods yet". Eight times as many flu cases were reported among UK horses in the first six weeks of 2019 as in the whole of 2018, and there was particular concern about its appearance in vaccinated horses and thoroughbreds.