Which vaccine is not typically recommended for immunocompromised patients?

The MMR vaccine, which stands for measles, mumps, and rubella, is a live attenuated vaccine. For immunocompromised patients, especially those with conditions that significantly weaken the immune system, live vaccines can pose a risk because they may not adequately control an attenuated virus. In such individuals, receiving a live vaccine could potentially lead to disease due to the body’s inability to mount an effective immune response to the weakened pathogens.

In contrast, vaccines such as typhoid, pneumococcal, and hepatitis A are either inactivated vaccines or polysaccharide vaccines, which do not pose the same risks for immunocompromised patients. These types of vaccines are generally considered safe and are encouraged to help protect these patients against serious infections. Therefore, the recommendation against administering the MMR vaccine to immunocompromised patients is based on safety and the potential for adverse effects.