Covid-19 roundup: Re­searchers claim tri­al suc­cess for Roche's Actem­ra as Alex­ion jumps in; Pfiz­er gam­bling $500M on an am­bi­tious cam­paign

Af­ter Re­gen­eron an­nounced a set­back on Mon­day with its re­search on the use of Kevzara in fight­ing the pan­dem­ic, hopes for the an­ti-in­flam­ma­to­ry IL-6 class …

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