Immunologist
To estimate the effectiveness of two or three doses of vaccines against covid-19 infection and hospitalisation, researchers in Denmark conducted a study of all previously uninfected Danish residents aged 12 years and older. The conclusion of the research, which is published in PLOS Medicine, is that a third dose provided greater protection against infection and hospitalisation with omicron than two vaccines.
In Spain, since 13 January, the booster vaccination against covid-19 has been recommended for the general adult population. 78.8 % of those over 50 and 88.9 % of those over 60 have already had it, said the Minister of Health yesterday. If those who are missing have doubts, here we try to solve them.
Spain recommends that people who have been infected with the coronavirus receive the third dose four weeks later. Experts assess the decision from an immunological point of view.
The new B.1.1.529 variant, dubbed Omicron, has spread across the globe, with new countries announcing its detection with each passing day. While questions such as whether it is more transmissible are being investigated, the biggest question surrounds its relationship with vaccines - will they cease to be effective, and will this variant escape our immune systems? Several experts answer.
A study of 32 million adults in England has shown a small increase in the risk of suffering from Guillain-Barré syndrome and Bell's palsy, two neurological conditions, after receiving AstraZeneca's vaccine. There was also an increased risk of stroke after receiving Pfizer's vaccine. However, according to the paper, these side effects are rare and the chances of suffering them are much higher after SARS-CoV-2 infection.