The Latest: Biden hails vaccine boost, virus war still on

U.S. President-elect Joe Biden has hailed as a “breakthrough” Pfizer’s announcement that its vaccine data suggests the shots may be 90% effective at preventing COVID-19.
Biden on Monday congratulated those involved in giving the country “such cause for hope.”
But at the same time, Biden noted that the end of the battle against COVID-19 is still months away.He said even if a vaccine is approved by the end of this month and some Americans are vaccinated later this yea