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).
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).