It is safe to prevent some things, but, others you must not prevent.
Prevent
prevent it
What is there to prevent?Nothing will happen!
You can't prevent it.
I prevent a cool show.
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If you have a question like this though, what shold be the answer? If it asks you this in your spelling..
I don't think so? But I heard sperm can prevent wrinkles, or help prevent them.
No, Mirena does not prevent chlamydia.
How to prevent the ailment of leukemia
The future tense is will prevent.