by partly decomposing ruminants' stomachs by enzyme pref. trypsin suspending the decomposed tissue, growing aphthic virus in the suspension, adsorbing an aluminium hydroxide and in activating in known manner or in activating the suspension at first then mixing with an adjuvant....
by partly decomposing ruminants' stomachs by enzyme pref. trypsin suspending the decomposed tissue, growing aphthic virus in the suspension, adsorbing an aluminium hydroxide and in activating in known manner or in activating the suspension at first then mixing with an adjuvant....