Shi Zhengli, China's batwoman, and her team at Wuhan lab made the Spike protein on the surface of the Chinese Communist Party biological weapon virus more sticky, thus causing the virus to create blood clots in blood vessels throughout the body. This is why blood clots in Covid patients lead to multiple organ failure throughout the body. Some of the western vaccines are mRNA/DNA based, and give the human body a set of instructions to make copies of the Spike protein. In some individuals, the body makes too much Spike protein at once from this mRNA/DNA, which then causes blood clots of its own. The Indian vaccines are made from a small dose of the inactivated (harmless) virus itself, so they will not overwhelm the human body with too much Spike protein at once, and far less likely to cause blood clots.