[A method of preparing a reagent for assessing the activity of the second component and factor B of the complement...

The method is intended for preparing a reagent for the detection of the second component and factor B of the complement system. It makes use of an unsophisticated device for even time-controlled heating of the serum by letting it pass through a coil pipe submerged in the bath. The resultant reagent is used to measure the activity of the second component and B factor of the complement system and may be used for assessing humoral immunity in patients.