Jan 29 (Reuters) - U.S. stock index futures extended
declines on Friday as Johnson & Johnson JNJ.N said its
single-dose vaccine was 72% effective in preventing COVID-19 in
the United States, but a lower rate of 66% was observed
globally.
Those results compare to the high bar set by two authorized
vaccines from Pfizer Inc PFE.N /BioNTech SE BNTX.O and
Moderna Inc MRNA.O , which were around 95% effective in
preventing symptomatic illness in pivotal trials when given in
two doses.
Those trials, however, were conducted mainly in the United
States and before the broad spread of new variants now under the
spotlight. At 8:06 a.m. ET, Dow e-minis 1YMcv1 were down 342 points,
or 1.12%, S&P 500 e-minis EScv1 were down 40.25 points, or
1.07%, and Nasdaq 100 e-minis NQcv1 were down 150 points, or
1.14%.