That suggests that it was changes in gay and bisexual men's sexual behaviors, not the vaccine, that caused the outbreak to subside, researchers concluded.
Those who received at least two vaccinations and had fewer repeat infections, and those who were infected with later variants of SARS-CoV-2 had lower measures of cognitive decline.
...A new CDC report finds that the updated (2023-2024) COVID-19 vaccines cut the risk in half for visiting the emergency department, urgent care, or being hospitalized with COVID-19 for most people.
Officials generally are pleased if a flu vaccine is 40% to 60% effective.
The shots tend to do better when they are well matched against the circulating flu strains. Officials say that’s what’s happened during this — relatively typical — flu season.
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