The present invention relates to the technical field of porcine pseudorabies virus, and more particularly to a porcine pseudorabies virus (PRV)-YF strain, with the preservation No. of CCTCC No. V201502. The present invention also provides an application of the porcine pseudorabies virus (PRV)-YF strain in preparing an inactivated vaccine of the porcine pseudorabies virus, the inactivated vaccine of the porcine pseudorabies virus and a preparation method thereof. It is proved through an immune efficacy evaluating test and a safety test that the inactivated vaccine of the porcine pseudorabies virus has good immune protective efficacy and is safe for weaned piglets, replacement gilts, pregnant sows and the like.

A method for production of a Varicella Zoster Virus surface protein antigen is disclosed. The method for production of a Varicella Zoster Virus surface protein antigen is an effective production method capable of obtaining the Varicella Zoster Virus surface protein antigen in high yield and high purity. Therefore, the method is useful for production of the Varicella Zoster Virus surface protein antigen for use as a vaccine composition for preventing or treating varicella or herpes zoster.

Provided herein is a method for producing an inactivated virus including a) heating the virus to a temperature sufficient to disrupt the virus membrane; b) exposing the virus of step (a) to a nucleic acid degrading enzyme; and c) cooling the virus to a temperature sufficient to reestablish the integrity of the virus membrane. Also provided herein is a vaccine produced using the instant method.

The present invention relates to methods for inactivating a lipid-enveloped virus using environmentally compatible detergents, and to methods for preparing a biopharmaceutical drug using environmentally compatible detergents. The invention also provides environmentally compatible detergents.

Aspects of the invention provide therapeutic recombinant protein preparations and methods of preparing therapeutic recombinant protein, which methods include contacting recombinant protein preparations with zwitterionic detergent at or above critical micelle concentration of the detergent.

The present invention relates to methods for inactivating a lipid-enveloped virus using environmentally compatible detergents, and to methods for preparing a biopharmaceutical drug using environmentally compatible detergents. The invention also provides environmentally compatible detergents.

Provided herein is a method for producing an inactivated virus including a) heating the virus to a temperature sufficient to disrupt the virus membrane; b) exposing the virus of step (a) to a nucleic acid degrading enzyme; and c) cooling the virus to a temperature sufficient to reestablish the integrity of the virus membrane. Also provided herein is a vaccine produced using the instant method.