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A new study has shown that Covid-19 can spread between unmasked people at a distance of more than two metres even outdoors. A team of engineers from the University of Cambridge used computer modelling to quantify how droplets spread when people cough. They found that the two-metre rule was arbitrary and that social distancing alone was not enough to stop the spread of the virus. The team also found that individual coughs vary widely, and that the 'safe' distance could have been set at anywhere between one to three or more metres. The results, published in the journal Physics of Fluids, suggest that social distancing is not an effective mitigation measure on its own, and underline the importance of vaccination, ventilation and masks.

A groundbreaking study analysing data from nearly 600,000 cancer patients in England has shed light on the increased risk of second cancers among breast cancer survivors. The research conducted by University of Cambridge in association with the Lancet Regional Health-Europe studied data from over 580,000 female and over 3,500 male breast cancer survivors diagnosed between 1995 and 2019 using the National Cancer Registration Dataset. The findings suggest that survivors of breast cancer, the most prevalent cancer in the UK, face a substantially higher risk of developing second primary cancers. According to the research, female survivors exhibited a twofold increase in the risk of contralateral breast cancer compared to the general population. The data highlighted an 87 per cent greater risk of endometrial cancer, a 58 per cent greater risk of myeloid leukemia, and a 25 per cent greater risk of ovarian cancer in female survivors.