P-Value & Vaccine Efficiacy

	A	B	C	D	E
1		Varicella	Non-case	Total
2	Vaccinated	18	134	152
3	Unvaccinated	4	5	9
4	Total	22	139	161
5
6				p-value	0.9741
7	Risk Ratio
8				Significant At
9	Vaccinated	11.84%		90% confidence:	YES
10	Unvaccinated	44.44%		95% confidence:	YES
11				99% confidence:	NO
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13	Vaccine Efficiacy
14	VE	73%
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