Agglutinating activity in viral infections remained present for periods varying from two to twenty-two weeks before disappearing in convalescence in 21 of 23 cases followed serially (Fig. 3). The two ...

WE have already described a haemagglutination reaction between erythrocytes treated with cold tannic acid and guinea-pig serum (diluted to about 1 : 100). We have also observed a marked increase in ...

VOLUNTEERS were injected with conjugates of 2,4-dinitro-phenyl–human serum albumin (DNP–HSA) 1. Sixty per cent of subjects developed rising titres of agglutinating activity to DNP coupled red cells ...