define about virus explain about hours covid 2 bracket covid-19 virus also define about vaccination
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Therefore, to be safe, it's best to wait at least 14 days after you were either diagnosed with Covid-19 or started having Covid-19 symptoms before getting a Covid-19 vaccine. This applies whether you are looking to get your first dose or your second dose of the vaccine
All viruses – including SARS-CoV-2, the virus that causes COVID-19 – evolve over time. When a virus replicates or makes copies of itself, it sometimes changes a little bit, which is normal for a virus.
The COVID-19 vaccines that are currently in development or have been approved are expected to provide at least some protection against new virus variants because these vaccines elicit a broad immune response involving a range of antibodies and cells. Therefore, changes or mutations in the virus should not make vaccines completely ineffective.