Table 1. Viruses detection amounts via real-time fluorescence quantitative PCR.

Sample name	Sample type	Number	Detection results
			UEV+1	EV71+2	CVA16+3	CVA6+4
Children’s caregiver sample	Nasal and throat swab	98	7 (7.14%, 95% CI5: 2.04%, 12.24%)	0	0	0
Environmental sample	Air/wiping facilities	159	8 (5.03%, 95% CI: 1.63%, 8.43%)	0	0	0
Playgrounds in Guangzhou	Wiping facilities	92	7 (7.61%, 95% CI: 2.21%, 13.01%)	0	0	0
Public area in Shaoguan	Air	67	1 (1.49%, 95% CI: 0, 7.00%)	0	0	0
Total	—	257	15 (5.84%, 95% CI: 2.98%, 8.70%)	0	0	0

¹UEV+: Universal enterovirus positive.

²EV71+: Enterovirus 71 positive.

³CVA16+: Coxsackievirus A16 positive.

⁴CVA6+: Coxsackievirus A6 positive.

⁵95% CI: 95% confidence interval.