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The ability of a segment of a glass sphere to magnify whatever is placed before it was known around the year 1000, when the spherical segment was called a reading stone, essentially what today we might term a frameless magnifying glass or plain glass paperweight.
Source: wiktionary
Faced with this situation, the arrival of the Covid19 pandemic in late winter/early spring 2020 showed the real situation of the country, its fragility and the challenges it faces. Thus, analysis of the impact of Covid19 on Tunisia offers a useful magnifying glass to understand the path of Tunisia from the 2011 revolution to the present.
Source: wiktionary