 says   is just 39% effective as  spreads, but still prevents severe illness https://t.co/iRd3F7Veh7 $PFE $BNTX $MRNA $JNJ $NVAX $AZN $SPY $DIA $QQQ $IWM $IWN $IWO $TLT $IEF $TYX $IAU $VIX $VIIX $UVXY