Diagnosis is usually made by examining the rash If in doubt you can use laboratory tests by blood or fluid from blisters culture

Can you repeat this sentence, but add in punctuation?
Diagnosis is usually made by examining the rash. If in doubt you can use laboratory tests by blood or fluid from blisters culture.
These continue to appear for many days even up to two to three weeks due to a slow reaction to absorbed urushiols and depending on how much resin touched the skin at a given point

Can you repeat this sentence, but add in punctuation?
These continue to appear for many days, even up to two to three weeks due to a slow reaction to absorbed urushiols and depending on how much resin touched the skin at a given point.
This example will show all channels whose topic has been changed in the last 30 minutes

Can you repeat this sentence, but add in punctuation?
This example will show all channels whose topic has been changed in the last 30 minutes.