Covid vaccines. Does the heterologer protect more? Do single doses work? Everything we know about coverage and side effects

The combination of different anti-Covid vaccines in one person guarantees higher protection than the two doses of a single vaccine, but there are many uncertainties about the side effects. This is highlighted by an analysis published on Nature.com. In particular, “there are more and more studies that support the idea that heterologous vaccination, with one dose of AstraZeneca and one of Pfizer, triggers a similar or even stronger immune response than two doses of the same vaccine“.