1 Vitamin D Deficiency âLow Vitamin D has been associated with several types of cancer as well as certain autoimmune diseases such as systemic lupus. 2  HIV/AIDS âNearly half of the people who get HIV/AIDS are African American, suffering more deaths than any other race.
The most common vaccine-preventable diseases among travellers are influenza and hepatitis A. Other vaccines to consider for travel include rabies, hepatitis B, typhoid, cholera, yellow fever, Japanese encephalitis and measles. Many vaccines can be given by flexible accelerated schedules to ensure early protection.
DNA vaccines are able to stimulate cell-mediated immunity whereas traditional vaccines stimulate humoral immunity. Traditional vaccines have been developed against numerous bacterial and viral pathogens, but the development of vaccines against many important viruses has been elusive.Generally where immunization has been successful, the host immune system makes neutralizing antibodies against the pathogen.raditional vaccines have been developed against numerous bacterial and viral pathogens, but the development of vaccines against many important viruses has been elusive. Generally where immunization has been successful, the host immune system makes neutralizing antibodies against the pathogen.