Definition: In this task, you're given a paragraph from the research paper and your task is to generate a suitable title for the research paper based on the given paper. Under 100 words is a good title length.
Input: Background: Upper respiratory tract infection symptoms are a common cause of morbidity. Herbal preparations of the plant Echinacea purpurea have immune-enhancing properties. Objective: To compare the frequency of upper respiratory tract symptoms in individuals receiving E purpurea capsules and those receiving placebo to evaluate the preventive efficacy of echinacea. Methods: In a randomized, double-blind clinical trial, 90 volunteers recruited from hospital personnel were randomly assigned to receive 3 capsules twice daily of either placebo (parsley) or E purpurea for 8 weeks during the winter months. Upper respiratory tract symptoms were reported weekly during this period. Results: Fifty-eight individuals were included in the final data analysis: 28 in the echinacea group and 30 in the placebo group. Individuals in the echinacea group reported 9 sick days per person during the 8-week period, whereas the placebo group reported 14 sick days (z ϭ Ϫ0.42; P ϭ .67). Mild adverse effects were noted by 8% of the echinacea group and 7% of the placebo group (P ϭ .24). Conclusion: Prophylactic treatment with commercially available E purpurea capsules did not significantly alter the frequency of upper respiratory tract symptoms compared with placebo use.

Effects of echinacea on the frequency of upper respiratory tract symptoms: a randomized, double-blind, placebo-controlled trial