UNDERSTANDING CORONA A pandemic is keeping the world on tenterhooks, with unprecedented implications for human coexistence, science, economics and politics. Every day, knowledge about the SARS-CoV-2 virus, its mutants, and measures to combat the infection grows. Thousands of reports, technical papers, discussions, study results, assessments, and comments reach the public. The information covers basic areas of knowledge - from aerosols and vaccines to winter sports. The target audience is people who want to get information quickly, politicians, authorities, universities, schools, companies, SMEs and businesses. Important sources and links on the pandemic, authorities, ministries and occupational health guidelines are directly available in the book. A VIRUS PARALYZES US The pandemic involving SARS-CoV-2 and known mutations of this virus poses an unprecedented medical and economic challenge to the world's population. Measures to inhibit the spread of the virus are essential until there is sufficient immunization of the world's population. In addition to monitoring the spread of the virus and its gene sequences, consideration of the physicochemical properties of the virus (virus persistence in aerosols, temperature dependence, dependence on humidity and UV radiation) appears relevant to reduce the spread of the virus. WEATHER DEPENDENCE Observations as well as literature reviews suggest a dependence of infection rates on weather conditions is likely. PROPOSED SOLUTIONS to exit LOCKDOWN. Proposed solutions for returning to a normal daily routine are provided. We try to explain the pandemic and make it understandable and give people a perspective on a daily life with the virus. There is also advice for politicians to encourage thoughtful reactions. Translated with www.DeepL.com/Translator (free version)