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Table 2 Means of abortion rate over time, following 65 herd vaccinations, compared to baseline

From: Assessment of immediate production impact following attenuated PRRS type 2 virus vaccination in swine breeding herds

Weeks post PRRSv MLV vaccination

Abortion rate means

Standard Error of the mean

P-value*

Baseline

0.069%

0.000116

1

0.073%

0.000129

0.1658

2

0.070%

0.000124

0.4082

3

0.076%

0.000133

0.0775

4

0.068%

0.000119

0.6336

5

0.070%

0.000124

0.4148

6

0.068%

0.000120

0.6193

  1. * = mixed regression model of each group compared to baseline