PCR

“Test, test, test” was one of the mantras of the WHO director general Tedros Adhanom Ghebreyesus against COVID-19. The issue is particularly relevant in the “unlocking” phase several European countries are going through, as the curve of the pandemics bends. At this stage, and while effective vaccines or therapies are still not available, tests are crucial to keep the disease at bay. But are they effective and reliable?