The Pfizer vaccine will be the first to become requiring for service members.
The COVID-19 mortality rate for troops has grown 25 times in the past few months.
Mask mandates are back at certain DoD facilities.
The Marine Corps' rate has increased since March, though it's still well behind the other services.
Numbers show the Navy has the highest vaccination rate, the Army the lowest.
About 30 percent of the force is vaccinated, according to the head of the Defense Health Agency.
The jobless rate for all veterans rose from 5.3 percent in December to 5.5 percent in January.
The deaths are the first reported for February.
A New York National Guardsman and Reserve sailor bring January's death toll to three.
The unemployment rate among all American veterans was 5.3 percent in December.
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