1. Can babies with allergies get vaccinations? Milk is a stabilizer or emulsifier for some vaccines. Currently, vaccines containing milk proteins include: measles and rubella vaccines, 100-vax vaccine, oral polio vaccine (oral sugar pill), and 13-valent pneumococcal vaccine. Vaccination is not a contraindication for babies with milk allergy, and most allergic babies without other comorbidities do not experience serious adverse reactions after vaccination. Although reports of allergic reactions to vaccines are rare, the risk should not be ignored. Recommendation: Observe for 1 hour after vaccination. 2. Some vaccines are produced with chicken embryos, and these vaccines contain egg proteins: (1) measles-mumps-rubella vaccine, tick-borne encephalitis; these vaccines have very low egg protein content, and there are generally no obvious allergic reactions, but the risk should not be ignored. Recommendation: observe for 1 hour after vaccination. (2) Influenza, yellow fever, rabies vaccines; These vaccines have a high egg protein content and carry a risk of allergic reactions. Recommendation: vaccination is not recommended for babies with acute tachyphylaxis to eggs.