Shedding

Potentially fatal diseases children are vaccinated against in the US and how they shed:

•Diphtheria — Secondary transmission is impossible, as it does not contain the bacillus Corynebacterium diphtheriae, but an inactivated toxin (toxoid) produced by the bacillus. http://www.immunize.org/catg.d/p4203.pdf

•Hepatitis A — There are two formulations, both using inactivated (killed) organisms. Secondary transmission of the vaccine virus is impossible as the vaccines do not contain live virus.

•Hepatitis B — Secondary transmission of the vaccine virus is not possible: vaccine virus is neither live nor whole.

http://www.cdc.gov/vaccines/pubs/pinkbook/hepb.html

•Hib — Secondary transmission of the disease is impossible, because the vaccine is made up of protein subunits not whole virus.

http://www.immunize.org/catg.d/p4213.pdf

•Influenza — Two types of flu vaccines are available: an inactivated (killed) quadrivalent vaccine administered by injection. Secondary transmission from the injectable formulation is impossibl.

And a live attenuated vaccine administered by nasal spray. There has been one recorded case of secondary transmission of the live attenuated vaccine. http://www.cdc.gov/vaccines/pubs/pinkbook/flu.html

•Measles —The attenuated Edmonston-Enders strain is used. Secondary transmission of the vaccine virus has never been documented. http://www.immunize.org/catg.d/p4209.pdf
•Mumps — The live, attenuated Jeryl Lynn strain is used. Secondary transmission of the vaccine virus has never been documented.

http://www.cdc.gov/vaccines/pubs/pinkbook/mumps.html

•Pertussis — Secondary transmission of the disease is impossible, because it is an acellular vaccine, containing only fragments of the pertussis organism, and is therefore incapable of replicating. http://www.immunize.org/catg.d/p4212.pdf

•Polio — The inactivated (killed) poliovirus vaccine, covering all 3 serotypes, is used. Secondary transmission is impossible as the vaccines do not contain a live virus .

http://www.immunize.org/catg.d/p4215.pdf http://www.polioeradication.org/Polioandprevention/Thevaccines.aspx

•Rotavirus — Vaccine-strain virus has been found in stool of vaccinated infants, but transmission has never been documented.

http://www.cdc.gov/vaccines/pubs/pinkbook/rota.html

•Rubella — The US vaccine uses the live, attenuated RA 27/3 rubella strain. Secondary transmission of the vaccine virus has never been documented; there is a possibility that the vaccine virus can be passed through breast milk.

http://www.cdc.gov/vaccines/pubs/pinkbook/rubella.html

•Tetanus — Secondary transmission from the vaccine is impossible, as it does not contain the bacillus Clostridium tetani, but an inactivated toxin (toxoid) produced by the bacillus.

http://www.immunize.org/catg.d/p4220.pdf

•Varicella — For the pediatric vaccine formulation, the live, attenuated Oka strain is used. Data suggest that transmission of varicella vaccine virus is a rare event.

According to the CDC, there are only 5 cases (out of, over 55 million doses administered) of infection caused by the vaccine shedding. The varicella vaccine virus may shed if a person develops vesicular rash, post vaccination.