The other type is virulent (produces disease), is the cause of FIP, and is called feline infectious peritonitis virus (FIPV). It is believed that FIP occurs when FECV mutates to FIPV in the cat and starts to replicate in the cat's cells. What causes this mutation is unknown.he other type is virulent (produces disease), is the cause of FIP, and is called feline infectious peritonitis virus (FIPV). It is believed that FIP occurs when FECV mutates to FIPV in the cat and starts to replicate in the cat's cells. What causes this mutation is unknown.
How long does a typhoid shot last?   According to the CDC website, a booster dose is needed every 2 years for people who remain at risk.. The oral (live) vaccine lasts 5 years before another dose is neededâ¦.
The simple answer to âHow long does a hepatitis B vaccine last?â is that the full course of a Hepatitis B vaccine includes three vaccinations that may be enough to last for a life time. The second dose of this series should be given one month after the first one, and third dose should be 6 months after the first one. These vaccines can be given with other vaccines esp. Hepatitis A + B. It is also important to realize that normally protective antibodies induced with hepatitis B vaccine lasts up to 15 years.