The researchers, however, noted that with Delta, Pfizer-BioNTech vaccine and Oxford-AstraZeneca preventive, known as Covishield in India, still offer good protection against new infections.
Two doses of either vaccine still provided at least the same level of protection as having had COVID-19 before through natural infection, they said.
The currently available artificial heart valves are either made of metal components (mechanical), or from animal tissues (bioprosthetic), each with its own disadvantages or complications, such as the risk of blood clot formation, valve failure due to degeneration, valve infection, the need for long-term blood thinner medications, etc.
The new heart valves developed using 3D printers can overcome these problems related to artificial heart valves, Dr Sanjay Cherian, the Vice President and COO at Frontier Lifeline Hospital, said in a statement.
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