The director of its Vaccine Research Center,Gary Nabel, says each antibody blocks the virus from attaching to white blood cells.

VOA: special.2010.07.14

Sir John Vane found that aspirin blocks the body from making natural substances called prostaglandins.

VOA: special.2009.10.20

After stops in 48 cities in 23 states, the Tea Party Express rolled to a stop just blocks from the White House.

VOA: standard.2010.04.15

Today,a few blocks up from the Boll Weevil Statue, conveyor belts carry rivers of peanuts to be cracked and ground at the Sessions Company.

VOA: standard.2010.08.10

This plant turns debris from buildings - many destroyed by Israeli air strikes - into sand and gravel that is then turned into cinder blocks for building.

VOA: standard.2010.06.16

Today,he trains and teaches young people blocks from where he grew up.

VOA: standard.2010.04.29

The Democrats met just three blocks from the White House, but with half a meter of snow on the ground from a winter storm, the trip became dangerous.

VOA: standard.2010.02.06

They are so far removed. And I have been to a couple of hockey games and so I know, and that's what five or six blocks away from here?

VOA: standard.2010.02.23

These days Old Salem is what's called a living history museum, with exhibits,music, and tours of 18th-Century houses,taverns and Moravian dormitory buildings just seven blocks from the tallest skyscraper in Winston-Salem.

VOA: standard.2010.03.18