Correction to: Animal Diseases 1, 22 (2021)

https://doi.org/10.1186/s44149-021-00021-9

Following the publication of the original article (Sun et al. 2021), some content was missing in fourth paragraph of the Main text section.

The sentence currently reads:

In the present study, PE(ΔIII) was constructed,expressed and purified as a vector to deliver PEDV S-A (aa 25–229) or S-B (aa 499–789) gene segments of the epidemic PEDV isolates of genogroup GII-a.

The sentence should read:

In the present study, PE(ΔIII) was constructed, expressed and purified as a vector to deliver PEDV S-A (aa 25–229) or S-B (aa 499–789+ aa 1370–1378) gene segments of the epidemic PEDV isolates of genogroup GII-a.

The original article (Sun et al. 2021) has been corrected.