Figure 4From: The effectiveness of high dose zinc acetate lozenges on various common cold symptoms: a meta-analysisThe effect of high dose zinc acetate lozenges on the duration of common cold symptoms. The pooled estimates and their 95% CIs are shown in this figure. The horizontal lines indicate the 95% CI for the effect and the squares in the middle of the horizontal lines indicate the point estimates of the effect on the particular respiratory and systemic symptoms. See Additional files 2 and 3 for the calculations.Back to article page