People who received their second dose of the Pfizer vaccine five or more months ago are more likely to test positive for…
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Russia was the first country to register a COVID-19 vaccine, with its health ministry giving emergency approval to the…
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Need to know: The Delta variant of SARS-CoV-2 is associated with increased transmissibility and disease severity. …
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A group of top infectious diseases experts are urging people to “pay it forward” when they have a COVID-19 vaccination to…
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Case study: meet Nathan who has severe breathlessness

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Doctors have highlighted a possible link between the Pfizer-BioNTech COVID-19 vaccine and blood clots, after a woman…
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Up to one-third of patients with immune-mediated inflammatory diseases taking methotrexate failed to achieve an adequate…
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A second Australian case of thrombosis with thrombocytopenia has been linked to AstraZeneca's COVID-19 vaccine. It occurred…
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