attenuated virus造句怎么写

More importantly, this live attenuated virus provided effective protection when it was administered to birds before they had hatched.

Most will be inactivated virus vaccines made in eggs, some will be killed virus vaccines made in cell cultures and a few will be live attenuated virus vaccines.

Effects of APS and OPS on porcine reproductive and respiratory syndrome attenuated virus vaccine

Effects of ginsenosides of stems and leaves on immune response to foot and mouth disease attenuated virus vaccine