Dubai: The landscape of single-dose vaccines against COVID-19 just got more interesting. On Sunday, US health authorities approved the Janssen vaccine as a single-shot against COVID, with 78% efficacy. This is seen as a “game changer” in the global counter-coronavirus drive.
Data from the clinical trials and massive vaccination rollouts lead some experts to make a case for single shots from Pfizer and Moderna vaccines, too. The latter two are messenger RNA vaccines currently being rolled out in North America, Europe and the Middle East as a double dose.
With millions of doses per day being administered, there’s a decent amount of information for data scientists to crunch. Some experts argue this delayed — or “fractional” — dosing, could help the world achieve herd immunity sooner. Other scientists oppose the strategy. Here’s the lowdown on single-dose COVID shots: