![]() This pandemic is unlikely to dissipate in the foreseeable future. ![]() ![]() The virus may continue to mutate, which is a challenge to the development of an effective vaccine and treatment. Clinicians and research scientists are still learning the natural history of the infection and the resulting damage on various body systems. The list of manifestations has expanded from flu-like symptoms to covering almost every body system (e.g., eye, nose, brain, lung, heart, gastrointestinal tract, and kidney). 2 The clinical manifestations continue to evolve and have become increasingly complex. ![]() Within ten months after the first cases were reported in China in December, 2019, over 30 million people had a confirmed diagnosis of Covid-19 and close to 1 million people had died worldwide. However, the massive and rapid spread of this virus is unprecedented. The exact source of the Covid-19 virus remains a mystery. ![]()
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