As5+

Arsenic ion requiring three electrons to return to its elemental state.

A proprietary vaccine adjuvant composed of the inorganic compound aluminum phosphate mixed with 3-deacylated monophosphoryl lipid A, a derivate of the bacterial…

A split-virus, inactivated influenza A (H1N1) vaccine containing H1N1 immunizing antigen combined with the adjuvant AS03, with potential immunostimulating activity. Upon intramuscular…

An oil-water emulsion comprised of QS21 and 3D-MPL used as a vaccine adjuvant to improve T-helper cells and antibody response.

Indicates that a drug or therapy should be used as often as the patient decides it is necessary.

As needed, usually referring to the timing of the administration of a treatment or medication.