As GSK and Sanofi promise to pro­duce a Covid-19 vac­cine at In­dy 500 speed, some ex­perts start to push back on time­lines

Glax­o­SmithK­line and Sanofi turned a few heads to­day as the two gi­ant vac­cine ri­vals joined hands and tech­nolo­gies as they set off on what they promised would be a light­ning-fast de­vel­op­ment pro­gram for a new Covid-19 vac­cine — some­thing bil­lions of peo­ple around the world have been de­vout­ly pray­ing for.

But this lat­est promise to move moun­tains and do some­thing that would have been wide­ly con­sid­ered im­pos­si­ble just 2 months ago is be­gin­ning to gar­ner some push­back from skep­tics who be­lieve these play­ers are prob­a­bly mak­ing promis­es they can’t keep.

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