Transfusion Medicine:  Allergy Immunotherapy and Platelet Apheresis
I did a ton of searching on this topic and was unable to find out more
than that generally, Blood Banks in the US want a person to wait 6
hours after receiving Allergy Immunotherapy injections before donating
blood or platelets.  The information that I am looking for is very
detailed information on why this 6 hour waiting period is in effect
including scientific studies.  My understanding on allergy
immunotherapy is that it is the same as being exposed to the
allergens, so how is it different than say being exposed to large
amouns of allergens (i.e. pollen) through normal means (i.e.
inhalation) and then donating platelets or other blood products.  It
seems to me that if the waiting period is 6 hours, the immunotherapy
does not provide much of a risk to the potential recipient of the
blood products.  Also, why 6 hours and not 3 or 12?  Other information
that I am looking for is for instance, how much of the allergens make
it into the bloodstream from standard subcutaneous injection of
Allergy Immunotherapy serum.  Any studies regarding exposure to blood
products transfused from a donor with recent injection of
Immunotherapy would be helpful as well.  My interest is mainly what
appears above especially regarding Platelets.  Also, not part of the
actual question, but I am also interested in how likely the common
cold is to be transmitted through transfusion of blood products.

Thanks much!