Aspiration before immunotherapy injection is not required.
Waibel
Kirk H
KH
D000293:Adolescent; D000328:Adult; D000368:Aged; D001769:Blood; D002648:Child; D006801:Humans; D007114:Immunization / Q000379:methods; D007273:Injections, Intramuscular / Q000379:methods*; D007279:Injections, Subcutaneous / Q000379:methods*; D008875:Middle Aged; D013396:Suction / Q000295:instrumentation; D013594:Syringes