Wearable sensors, such as smartwatches and fitness bands, can reveal a person’s physiological response to the Covid-19 vaccination, according to a study. The study, published in npj Digital Medicine, analysed sensor data on sleep, activity and heart rate from over 5,600 individuals. The findings showed that the average resting heart rate of participants significantly increased the day following vaccination, peaking two days post-vaccination, and returning to normal four days after the first dose and six days after the second. The effect appeared to be stronger after the second dose of the Moderna vaccine, compared to the Pfizer-BioNTech vaccine, and more pronounced in younger individuals. This suggests that prior Covid infection was linked with a significantly higher resting heart rate increase after the first vaccine dose relative to those without prior infection. The increase is also consistent with an expected greater immune response for these individuals, the researchers said. “Investigating the physiological signals in the period around vaccination can help us better understand the variability of vaccine response between people, as well as the changes from an individual norm due to vaccination,” said lead author Giorgio Quer, director of Artificial Intelligence at the Scripps Research Translational Institute.   Source: IANS