Dr Julian Lewis: To ask the Secretary of State for Health and Social Care, whether vulnerable residents in (a) care homes and (b) hospital facilities will be less at risk of serious illness in the event that they are infected with covid-19 by staff who have been fully vaccinated against that disease; to what extent being fully vaccinated against covid-19 prevents a person from transmitting that virus to vulnerable people; and if he will make a statement. 
[Due for Answer on 16 September. Answered on 22 September.]
HOLDING ANSWER: The Department of Health and Social Care has indicated that it will not be possible to answer this question within the usual time period. An answer is being prepared and will be provided as soon as it is available.
The Parliamentary Under-Secretary of State for COVID-19 Vaccine Deployment (Maggie Throup): Several studies have provided evidence that vaccines are effective at preventing infection and symptomatic disease. Uninfected individuals cannot transmit the virus, therefore the vaccines are also likely to be effective at preventing transmission from staff to vulnerable patients. Data from Scotland has also shown that household contacts of vaccinated healthcare workers are at reduced risk, which is in line with the studies on infection. There may be additional benefit due to prevention of infection, if some individuals who become infected despite vaccination are also at a reduced risk of transmitting because of reduced duration or level of viral shedding.