As we have learned, the likelihood that ionizing radiation levels at an accident scene would be high enough to cause injury to someone responding to an accident is extremely remote. Unbroken radioactive material packages never have a surface radiation level exceeding 1000 mR/hr, and packages likely to break under accident conditions are used only for materials low enough in radioactivity to present no immediate hazard if dispersed.
Therefore, you should not delay helping injured individuals out of concern for radiological hazards. You should give normal first aid to the extent qualified.