The Delta variant of Covid-19 is much more transmissible than the original Wuhan variant, as it takes 10 times fewer virus particles to catch the infection, according to Rinat Maksyutov, director of the Vector State Research Center of Virology and Biotechnology. "The Delta variant is transmitted from an infected organism to a non-infected one much quicker," he said. Also read: CVASU study confirms Delta has taken over as dominant strai The Delta variant was first reported in India in October 2020. This variant is capable of infecting people who have been vaccinated with the Covaxin and Covishield vaccines used in India, according to the All-India Institute of Medical Sciences. The Delta Plus strain is believed to be even more contagious. Also read: 'Moderate, severe forms predominant for Delta strain of Covid'