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COVID-19 Vaccine Breakthrough Cases: Data from the States
By Jennifer Kates, Anna Rouw & Josh Michaud
U.S. CDC internal report says Delta variant as contagious as chickenpox - report
Universal Face-Mask Mandates Are Back. Here's What to Know.
By Chas Danner
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Should you be wearing a mask again? Here's a map of the Covid hot spots subject to the CDC's new guidance
By Nate Rattner
CDC mask decision followed stunning findings from Cape Cod beach outbreak
By Anne Flaherty & Arielle Mitropoulos
What the CDC's 'substantial' and 'high' levels of Covid-19 transmission actually mean
By Jessica Firger & Eric Levenson
Timeline: CDC mask guidelines during the COVID pandemic
By Deborah Netburn
8 Things to Know About Breakthrough COVID Infections
By Rachel Nania
CDC Calls for Return to Universal Masking in Schools
By Sarah D. Sparks
New US mask guidance prompted by evidence vaccinated can spread Delta
By Maya Yang, Adam Gabbatt & Martin Pengelly
As Covid Cases Rise All Over U.S., Lower Vaccination Rates Point to Worse Outcomes (Published 2021)
By Lauren Leatherby
CDC study shows three-fourths of people infected in Massachusetts coronavirus outbreak were vaccinated but few ...
By Carolyn Johnson, Yasmeen Abutaleb & Joel Achenbach
CDC mask guidance made easier: Check this county COVID risk map : Shots - Health News
By Ruth Talbot, Selena Simmons-Duffin & Thomas Wilburn
The Delta Variant Is Winning
By Katherine J. Wu
CDC wants vaccinated Americans to wear masks indoors in Covid hot spots
By Adam Cancryn & Erin Banco
Breakthrough COVID infections show ‘the unvaccinated are now putting the vaccinated at risk’
By Laura Santhanam
CDC updates mask guidelines, recommends that some vaccinated people wear them indoors again
By Alexander Tin, Kathryn Watson & Max Bayer
Study: Vaccinated people who got ‘breakthrough’ infections can carry as much virus as others
By Lindsey Tanner & Philip Marcelo
CDC warns in internal document that 'war has changed' with the coronavirus
By Sara G. Miller, Shannon Pettypiece & Denise Chow
CDC recommends the vaccinated wear masks in areas with low vaccination rates
By Meg Tirrell, Laura Strickler & Shannon Pettypiece
CDC under fire for decision to limit tracking of Covid-19 cases in vaccinated people
By Rachel Roubein & David Lim
CDC's new masking guidance prompted by science that emerged in just the last several days, Walensky says
By Madeline Holcombe & Jason Hanna
About 99.999% of fully vaccinated Americans have not had a deadly Covid-19 breakthrough case, CDC data shows
By Deidre McPhillips & Christina Maxouris
CDC updates guidance, recommends vaccinated people wear masks indoors in certain areas
By Jacqueline Howard
CDC shares 'pivotal discovery' on Covid-19 breakthrough infections that led to new mask guidance
By Michael Nedelman
CDC reverses indoor mask policy, saying fully vaccinated people and kids should wear them indoors
By Berkeley Lovelace & Berkeley Lovelace Jr.
CDC study shows 74% of people infected in Massachusetts Covid outbreak were fully vaccinated
By Berkeley Lovelace & Berkeley Lovelace Jr.
CDC says "pivotal discovery" about Delta variant prompted new mask guidance and urges universal masking in some places
By Alexander Tin
CDC Changes Mask Guidance For Vaccinated People, Including In Schools : Shots - Health News
By Allison Aubrey
Vaccinated People With Breakthrough Infections Can Spread The Delta Variant, CDC Says
By Laurel Wamsley
What to Know About New C.D.C. Mask Guidelines for the Vaccinated
By Apoorva Mandavilli, Sheryl Gay Stolberg & Daniel E. Slotnik
C.D.C. Internal Report Calls Delta Variant as Contagious as Chickenpox (Published 2021)
By Apoorva Mandavilli
CDC urges vaccinated people in covid hot spots to resume wearing masks indoors
By Dan Diamond, Adam Taylor & Yasmeen Abutaleb