Case rates half in Wiltshire - as council issues warning over half-term sleepovers and parties Covid cases in Wiltshire have nearly halved, new figures show. Wiltshire Council's public health team has issued the latest round of updates in relation to containing the virus. People have been urged to refrain from sleepovers or parties over the school break next week. As of 4.05pm on May 24, in the previous seven days there were 33 new cases, compared to 71 in the previous week. The current rate of cases per 100,000 in Wiltshire in the last seven days is 6.6 which is below the national average of 22.