borderline significantp = 0.0523
In contrast, during March–May 2014 (n = 96), dominating emm types changed, with a borderline significant increase in emm 3 (from 10% in March–May 2009–2013 to 20% in 2014; χ 2 (1df) = 3.766, p = 0.0523), and a significant >5-fold increase in emm 4 (from 3% to 17%; χ 2 (1df) = 9.478, p = 0.0021).