Fiasco at Public Health England: Seems they were using an obsolete version of Excell as their database of cases to track. On about September 24th, the number of active cases in the database went over 65535, so Excell just dropped any additions. Somebody just noticed the number had remained at that level for a couple of weeks. They failed to track about 16000 cases. The average number of close contacts per case is three, so about 48,000 potentially exposed people have been merrily wandering around England when they should have been isolated or taking precautions.