Table 1.

 Background data for study population

	Number	%
Age‐groups (years)
<1	23	8·7
1	24	9·1
2–4	50	18·9
5–9	34	12·9
10–19	28	10·6
20–44	52	19·7
45–64	26	9·8
65‐	27	10·2
Gender
Male	125	47·3
Female	139	52·7
Vaccination history
Yes	16	6·1
No	248	93·9
Total	264	100·0