<unk>  eggs can be used to make vaccines. Mice raised under<unk>  conditions (no Helicobacter pylori) were shown to develop colitis rather than enterocolitis. See also== * Filtered Air Positive Pressure * Gnotobiotic animal
Specific-pathogen-free
Vaccine ingredients
Natural reservoir
Vaccines for Children Program
International Certificate of Vaccination or Prophylaxis
PLOS Pathogens
Timeline of human vaccines
Preclinical development