Corona has been declared as silent killer by the world health organization as such in number of cases no symptoms of corona virus have been found however when the test results came before the medical experts it has been declared as a positive impact of this disease under these circumstances and conditions of the world wide disease it has become difficult to control the said disease till any effective steps taken in this behalf of the demanded vaccine required for the welfare of society and circle to improve the immune system of the human body and system of survival.
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