From: Incorrect identification of recent Asian strains of Coxsackievirus A16 as human enterovirus 71: Improved primers for the specific detection of human enterovirus 71 by RT PCR
Time lag between collection and testing
Number tested
Positive (%)
Negative (%)
1–2 months
28
27 (96.4)
1 (3.6)
3–12 months
20
6 (30.0)
14 (70.0)
>2 years
11
2 (18.2)
9 (81.8)