Chapter 9 - Inferences from Two Samples - 9-2 Two Proportions - Basic Skills and Concepts - Page 449: 5

There is sufficient evidence to reject that the vaccine had no effect.

The value of the test statistic is:z=-12.38798074, the P-value is: P=3.137085E-35, which is really close to 0, hence smaller than all significance levels, hence the null hypothesis has to be rejected. Hence we can say that there is sufficient evidence to reject that the vaccine had no effect.