The Boston Marathon bombing on April 15 killed three and injured more than 200, 48 of whom were still in hospital, three in a critical condition, according to Reuters.
At least 14 people lost all or part of a limb and three of them lost more than one.
Doctors say every one of the people injured in the Boston Marathon blasts who made it to a hospital alive now seem likely to survive.
On Saturday estimates of the injured jumped from 180 to 264 as people with delayed health issues arrived at hospital.
Nick Martin, a spokesman for the health commission, explained the sudden jump across 26 hospitals.
“One of the best examples is hearing issues,” Nick Martin said.
“People might have first thought their hearing problems would be temporary.”
Others sought delayed care for minor shrapnel wounds.
The injured include several people who arrived with legs attached by just a little skin, a 3-year-old boy with a head wound and bleeding on the brain, and a little girl riddled with nails.
Even a transit system police officer whose heart had stopped and was close to bleeding to death after a shoot-out with the suspects now appears headed for recovery.
Three people died in the terror attack at the Boston Marathon finish line: Martin Richard, 8, Krystle Campbel, 29, and Lu Lingzi, 23.
