Please update the text to be less complex
Effects of the two mustard agents are typically delayed: exposure to vapors becomes evident in 4 to 6 hours, and skin exposure in 2 to 48 hours.
When they are breathed in, symptoms usually do not appear for 4 to 6 hours. <SEP> When mustard agents get on the skin, symptoms can take 2 to 48 hours to appear.