Yes, that's correct. Mayo Clinic has some good basic information here: http://www.mayoclinic.org/tests-procedures/allergy-shots/basics/definition/prc-20014493 h

Yes, that's correct. Mayo Clinic has some good basic information here: http://www.mayoclinic.org/tests-procedures/allergy-shots/basics/definition/prc-20014493 http://www.mayoclinic.org/tests-procedures/allergy-shots/bas... Hope that's helpful.