'Not Practical': Cambridge Immunology Prof Questions Centre's Covid Guidelines | Karan Thapar https://www.youtube.com/watch?v=QM55ryPyHTg Prof. Lalita Ramakrishnan, Professor of Immunology and Infectious Diseases, raised questions about three particular aspects of the recent Covid guidelines – first, the government’s reiteration that aerosols can carry the infection up to 10 metres, second, the stress on frequently cleaning door handles, light switches, tables and chairs and, third, the need for double masking. In all three cases her views clash fairly sharply with the government’s recent guidelines.