What they're saying: "All this is good news," said Rochelle Walensky, director of the Centers for Disease Control and Prevention, during a briefing Wednesday. Big Number29,099,393. A new study shows that Pfizer and Moderna vaccines are less effective against the South African variant of the virus. However, there are concerns that Pfizer and Modernas vaccines, the first two of three approved for use in the U.S., will not be able to defend against new variants as well. Brazil now leads the world in new cases.
Pfizer and Current Vaccination Prevent Being Butchred.
( z0 prevent :ARG0 ( z1 and :op ( z2 doctor :ARG0-of ( z3 farm ) ) :op ( z4 vaccinate :time ( z5 current ) ) ) :ARG1 ( z6 butt-in ) )
(z0 / prevent-01
    :ARG0 (z1 / and
              :op1 (z2 / doctor
                       :ARG0-of (z3 / farm-01))
              :op2 (z4 / vaccinate-01
                       :time (z5 / current)))
    :ARG1 (z6 / butt-in-01))
Pfizer and Current Vaccination Prevent Being Butchred .
z2 :ARG0-of z3
z1 :op1 z2
z4 :time z5
z1 :op2 z4
z0 :ARG0 z1
z0 :ARG1 z6