New Delhi, July 4 -- Researchers at AIIMS, Delhi on Thursday said they were conducting new studies to determine the long-term effects of Covid-19 vaccination among young adults, even as they reiterated there was no direct link found between Covid vaccines and sudden deaths based on published studies. The two new studies are being conducted by multiple departments. The first study, titled "Establishing the cause in sudden unexplained deaths in young", is being conducted by the pathology and forensics departments, while the haematology department is examining long-term side effects of Covid, especially among young adults.. "...we want to find evidence of whether incidents of coronary artery disease have increased among young adults post-Covid...