The first lockdown in Austria began exactly a year ago. Much was still uncertain at this point, hardly anyone could have guessed what the then new situation could mean for the world and what effects the pandemic would have. Over time, however, we learned more and more about the spread of the virus, which measures are effective against it and which are less effective. The global Covid-19 vaccination campaign also started late last year, and testing is the order of the day for many people. But which test is actually the most reliable, and what does the dispersion factor say? Take the quiz!