COVID-19 Tests – Swab, Saliva, Serum, or Stool?

Dr Linda Calabresi

writer

Dr Linda Calabresi

GP; Medical Editor, Healthed

Dr Linda Calabresi

This week’s expert:
Dr Michael Wehrhahn, Clinical Microbiologist and Infectious Diseases Physician at Douglass Hanly Moir Pathology 

Drawn from Dr David Lim’s interview with Dr Michael Wehrhahn on the Healthed Podcast, ‘Going Viral’.

• Symptomatic patients who test negative to SARS-CoV-2 after a nasopharyngeal PCR test can have a high level of confidence in that negative result. There is no need to repeat the COVID-19 testing in the vast majority of cases.

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New Brain Health Guidelines – What GPs Can Do

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Scientia Prof Kaarin Anstey

Psychologist; Director, UNSW Ageing Futures Institute; ARC Laureate Fellow; Senior Principal Research Scientist, NeuRA

Scientia Prof Kaarin Anstey translates the WHO's updated 2026 dementia risk-reduction guidelines changes into concrete actions for opportunistic risk assessment and targeted advice in everyday general practice.