 | AstraZeneca, a viral vector vaccine, "is not very effective against the Omicron variant when only two doses are administered," says public health secretary Carmen Cabezas. People who have received two doses of AstraZeneca can now book appointments for their booster shots, regardless of their age, as was announced by Catalan health authorities on Monday. https://www.catalannews.com/covid-19/item/all-astrazeneca-recipients-can-now-get-booster-shots | Catalan News | Facebook