Twitter is now owned by Elon Musk — here’s a brief history from the app’s founding in 2006 to the present
Here’s a timeline of Twitter’s most notable moments over the past 16 years. International: Top News And Analysis
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Here’s a timeline of Twitter’s most notable moments over the past 16 years. International: Top News And Analysis
Find information on infection- and vaccine-induced immunity from the virus that causes COVID-19. 2019 Novel Coronavirus
Supporting evidence for CDC’s list of underlying medical conditions that put individuals at increased risk for severe illness from COVID-19. 2019 Novel Coronavirus
The risks of SARS-CoV-2 infection in fully vaccinated people cannot be completely eliminated, but the benefits of relaxing some measures may outweigh the residual risk. This page offers background rationale and data for public health…
COVID-19 transmission in schools is associated with community transmission. Transmission spread within schools can be limited with strict implementation of layered mitigation strategies. 2019 Novel Coronavirus
SARS-CoV-2 is transmitted by exposure to infectious respiratory fluids 2019 Novel Coronavirus