Website intended for a New Zealand health professional readership
Vaccinated people need to mask up again, according to the U.S. Centers for Disease Control and Prevention. On July 27, 2021, the CDC recommended that everyone in areas with high COVID-19 infection rates wear masks in public indoor spaces, regardless of vaccination status.
It’s a reversal from the CDC’s May 2021 advice that the fully vaccinated could leave their masks at home and brought U.S. guidelines more in line with World Health Organization recommendations.
The Conversation asked Peter Chin-Hong, a physician who specializes in infectious diseases at the University of California, San Francisco, to help put into context the science behind the changing messages
Kia ora and welcome to New Zealand Doctor Rata Aotearoa
Not a subscriber? Unlock this article by subscribing here.
Respiratory physician Lutz Beckert considers chronic obstructive pulmonary disease management, including the prevention of COPD, the importance of smoking cessation and pulmonary rehabilitation, and the lifesaving potential of addressing treatable traits. He also discusses the logic of inhaler therapy, moving from single therapy to dual and triple therapy when indicated, as well as other aspects of management
![Barbara Fountain, editor of New Zealand Doctor Rata Aotearoa, and Paul Hutchison, GP and senior medical clinician at Tāmaki Health [Image: Simon Maude]](/sites/default/files/styles/thumbnail_cropped_100/public/2025-03/Barbara%20Fountain%2C%20editor%20of%20New%20Zealand%20Doctor%20Rata%20Aotearoa%2C%20and%20Paul%20Hutchison%2C%20GP%20and%20senior%20medical%20clinician%20at%20T%C4%81maki%20Health%20CR%20Simon%20Maude.jpg?itok=-HbQ1EYA)
![Lori Peters, NP and advanced health improvement practitioner at Mahitahi Hauora, and Jasper Nacilla, NP at The Terrace Medical Centre in Wellington [Image: Simon Maude]](/sites/default/files/styles/thumbnail_cropped_100/public/2025-03/2.%20Lori%20Peters%2C%20NP%20and%20advanced%20HIP%20at%20Mahitahi%20Hauora%2C%20and%20Jasper%20Nacilla%2C%20NP%20at%20The%20Terrace%20Medical%20Centre%20in%20Wellington%20CR%20Simon%20Maude.jpg?itok=sUfbsSF1)
![Ministry of Social Development health and disability coordinator Liz Williams, regional health advisors Mary Mojel and Larah Takarangi, and health and disability coordinators Rebecca Staunton and Myint Than Htut [Image: Simon Maude]](/sites/default/files/styles/thumbnail_cropped_100/public/2025-03/3.%20Ministry%20of%20Social%20Development%27s%20Liz%20Williams%2C%20Mary%20Mojel%2C%20Larah%20Takarangi%2C%20Rebecca%20Staunton%20and%20Myint%20Than%20Htut%20CR%20Simon%20Maude.jpg?itok=9ceOujzC)
![Locum GP Helen Fisher, with Te Kuiti Medical Centre NP Bridget Woodney [Image: Simon Maude]](/sites/default/files/styles/thumbnail_cropped_100/public/2025-03/4.%20Locum%20GP%20Helen%20Fisher%2C%20with%20Te%20Kuiti%20Medical%20Centre%20NP%20Bridget%20Woodney%20CR%20Simon%20Maude.jpg?itok=TJeODetm)
![Ruby Faulkner, GPEP2, with David Small, GPEP3 from The Doctors Greenmeadows in Napier [Image: Simon Maude]](/sites/default/files/styles/thumbnail_cropped_100/public/2025-03/5.%20Ruby%20Faulkner%2C%20GPEP2%2C%20with%20David%20Small%2C%20GPEP3%20from%20The%20Doctors%20Greenmeadows%20in%20Napier%20CR%20Simon%20Maude.jpg?itok=B0u4wsIs)
![Rochelle Langton and Libby Thomas, marketing advisors at the Medical Protection Society [Image: Simon Maude]](/sites/default/files/styles/thumbnail_cropped_100/public/2025-03/6.%20Rochelle%20Langton%20and%20Libby%20Thomas%2C%20marketing%20advisors%20at%20the%20Medical%20Protection%20Society%20CR%20Simon%20Maude.jpg?itok=r52_Cf74)
![Specialist GP Lucy Gibberd, medical advisor at MPS, and Zara Bolam, urgent-care specialist at The Nest Health Centre in Inglewood [Image: Simon Maude]](/sites/default/files/styles/thumbnail_cropped_100/public/2025-03/7.%20Specialist%20GP%20Lucy%20Gibberd%2C%20medical%20advisor%20at%20MPS%2C%20and%20Zara%20Bolam%2C%20urgent-care%20specialist%20at%20The%20Nest%20Health%20Centre%20in%20Inglewood%20CR%20Simon%20Maude.jpg?itok=z8eVoBU3)
![Olivia Blackmore and Trudee Sharp, NPs at Gore Health Centre, and Gaylene Hastie, NP at Queenstown Medical Centre [Image: Simon Maude]](/sites/default/files/styles/thumbnail_cropped_100/public/2025-03/8.%20Olivia%20Blackmore%20and%20Trudee%20Sharp%2C%20NPs%20at%20Gore%20Health%20Centre%2C%20and%20Gaylene%20Hastie%2C%20NP%20at%20Queenstown%20Medical%20Centre%20CR%20Simon%20Maude.jpg?itok=Z6u9d0XH)
![Mary Toloa, specialist GP at Porirua and Union Community Health Service in Wellington, Mara Coler, clinical pharmacist at Tū Ora Compass Health, and Bhavna Mistry, specialist GP at Porirua and Union Community Health Service [Image: Simon Maude]](/sites/default/files/styles/thumbnail_cropped_100/public/2025-03/9.%20Mary%20Toloa%2C%20Porirua%20and%20Union%20Community%20Health%20Service%20in%20Wellington%2C%20Mara%20Coler%2C%20T%C5%AB%20Ora%20Compass%20Health%2C%20and%20Bhavna%20Mistry%2C%20PUCHS%20CR%20Simon%20Maude.jpg?itok=kpChr0cc)
