11. Seronegative sows are usually found only in PPV-free herds; in such cases, inactivated vaccine is indicated. 12. Three vaccines currently exist, which include a polyvalent vaccine, a monovalent vaccine, and a monovalent inactivated vaccine . 13. Inactivated vaccine does not, but it causes more local inflammation and possibly predisposes the cat to vaccine-associated sarcoma.14. Studies on live vaccines have very limited data, but these preparations may be more effective than inactivated vaccines . 15. In 1957 he joined the Animal Virus Research Institute, Pirbright as Head of the Inactivated Vaccine Research Unit. 16. The meta-analyses examined the efficacy and effectiveness of inactivated vaccines against seasonal influenza in adults, and the elderly. 17. This method is most commonly used for growth of influenza virus, both attenuated vaccine and inactivated vaccine forms. 18. Connaught will sell about 500, 000 doses of the inactivated vaccine this year, said a company spokeswoman, Chris Grant. 19. But some doctors said they were worried that the inactivated vaccine would not provide an equal level of protection. 20. Once they understood the issue, about 80 percent of the economically disadvantaged parents said they would prefer inactivated vaccine ,
