Women who were vaccinated against covid-19 in the luteal phase of their menstrual cycle reported having a breakthrough infection sooner than those vaccinated during their follicular phase

Source: [New Scientist](https://www.newscientist.com/article/2532245-your-menstrual-cycle-may-affect-how-well-vaccines-work/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home)

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