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My Spyware update date shows it is 3 to 4 days behind from today, Do I need to worry?
  Virus Updates and on a daily basis, whereas spyware updates are released less often, and there can be a gap of upto 15 days.

Spyware Updates are released once in 15 days or more often.

So you do not need to worry for spyware database update not showing todays date.
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