I caanot see list in Virus and Risk Activity Summary

Hi Chaps, There seemto be a problem with the Virus and Risk Activity Summary. It shows a large number under Still Infected, but when I click in the number it just gives me a list of 1 to 200 entries and that is it. I have also looked in the Risk logs for the past 24hrs and there appears to be nothing unusual there. Can somwone give me any advice or point me in the correct direction to see what this number means (4288)

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Any help is greatly appreciated

Thanks

PaulC