Ngaphezu kwalokhu loluhlelo luzophinde ludale amathuba emisebenzi amaningi emphakathini lapha Ngaloluhlelo sizoqinisekisa ukuthi abantu bakhelwa izindlu ezindaweni lapho behlezi khona abazukushintshelwa kwezinye izindawo. Indlu ngayinye izoba ngu 40 square metres nokuyindlu enkulu ngokwanele futhi engcono kakhulu nangokwesakhiwo. Increasing frequency of submerging one's head in the campground pool during the outbreak period was associated with increased risk for primary illness of either case type (age-adjusted OR = 3.3 for one-five times, 5.9 for six--15 times, 6.1 for [greater than or equal to] 16 times; p<0.05). Campers reported that the pool often was crowded at midday (e.g., "wall-to-wall" swimmers), particularly during weekends. An automated chlorine feeder with stabilized cyanurated chlorine was in use at the pool throughout the day. Chlorine levels were checked twice a day (i.e., at approximately 7 a.m. and 8 p.m.) with a handheld test kit. According to written records, chlorine levels were low (0.5-1.0 mg/L versus the required level of [greater than or equal to] 1.5 mg/L) almost every evening throughout late July and August. The pool operator was not certified by a national certification group.