Chat about Novel Coronavirus - 2019-nCoV - COVID-19

The source of the confusion is from a Dutch Health Ministry announcement that preliminary results indicated that they expect 85 people to be +ve but once the testing was done, it was only 61.

Up to 85 passengers on just two flights from South Africa could test positive for COVID-19 after arriving in the Netherlands on Friday morning, the Dutch health ministry announced after preliminary test results came back.

So far, tests for 110 of around 600 passengers have been processed with 15 coming back as positive. With a positivity rate of nearly 15 per cent, the Dutch health ministry believes it will find around 85 positive cases despite mandatory pre-departure testing.

Here's a Washington Post article mentioning 1 in 6.

https://www.washingtonpost.com/world/2021/11/27/amsterdam-omicron-covid-variant-lockdown/