COURTESY BY: https://www.hindustantimes.com/ As the United States celebrated its 244th birthday in an unusually somber manner reflecting the mood of a country in the throes of deadly coronavirus disease outbreak, President Donald Trump once again blamed China for it and held out hopes of a vaccine by the end of the year. The president, who held the July 4 celebrations against the advice of public health officials and experts warning that the virus is also spreading through these large gatherings, did not mention the fatalities in his speech. Currently the…