MPR Weekly Dose 129 — Omicron-Adapted Booster Dose; Influenza Season Guidance; Nirmatrelvir Efficacy; DEA Warn Over “Rainbow Fentanyl”; Chronic Idiopathic Constipation Tx

<p><span style="font-weight: 400;">Omicron-adapted COVID-19 booster vaccines; guidance for the 2022-23 influenza season; efficacy of COVID-19 antiviral; ‘rainbow fentanly’ targeting youth; and a device to treat chronic idiopathic constipation. </span></p>