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¦.
1 TheTravelClinic.com, located in Oregon, charges $70 for four capsules. 2  According to JohnnyVagabond.com, it is claimed that one person paid $160 for a single typhoid vaccine. 3  Others quoted as much as $500 for a package of vaccines. The oral vaccine is not recommended for those who have cancer of any kind. 2  Also, the oral vaccine should not be taken within 24 hours of intake of any antibiotics. 3  The typhoid vaccine does not guarantee 100 % protection from disease, so you should be careful against this disease even if you are vaccinated.