For many people worldwide, having cotton swabs thrust up their nose or down their throat to test for COVID-19 has become a routine and familiar annoyance.
But two years into the pandemic, health officials in some countries are questioning the merits of repeated, mass testing when it comes to containing infections, particularly considering the billions it costs.
Chief among them is Denmark, which championed one of the world's most prolific COVID-19 testing regimes early on. Lawmakers are now demanding a close study of whether that policy was effective.
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