Fig. 2From: Association between semi-quantitative microbial load and respiratory symptoms among Thai military recruits: a prospective cohort studyCycle threshold value distribution in non-acute and acute samples. Ct-value distribution for selected a bacteria and b viruses detected in non-acute samples collected at the start or end of the training period (orange bars) or acute samples from individuals experiencing an upper respiratory tract infection during follow-up (blue bars). A Ct-value of < 33 was considered a positive resultBack to article page