Granted, different vaccines are in use in different locales, but the differences reflect that data from clinical trials of various vaccines in a range of age brackets is still preliminary. (sciencemag.org)
Researchers are designing and conducting studies to determine true protection levels for various vaccines. (canismajor.com)
People with kwashiorkhor are unable to produce antibodies after being given various vaccines, including typhoid and diphtheria. (religion-online.org)