The effectiveness was measured using a score card where patients recorded their symptoms (feeling feverish, muscle pain, headache, sore throat, cough, overall discomfort and runny nose).
Som mål for virkningen angav patienterne på et kort en scoreværdi for symptomerne (feberfornemmelse, muskelsmerter, hovedpine, ondt i halsen, hoste, generelt ubehag og løbende næse).