16 Oct 2020

Covid-19: Case under investigation confirmed as historical

6:32 pm on 16 October 2020

A recent returnee who returned a weak positive result for Covid-19 after completing their two-week isolation has been confirmed to be a historical case.

Hands in medical gloves holding COVID-19 swab. Test tube for taking patient sample, PCR DNA testing protocol process. Nasal swab laboratory test in hospital lab.

(File image). Photo: 123RF

The Ministry of Health earlier today said the person's case was under investigation, but serology tests run today have shown the presence of antibodies that further confirm this is a historical infection.

A PCR test conducted today had also returned a negative result.

The person arrived from the US and went through 14 days in an Auckland managed isolation facility - where they returned two negative tests and were asymptomatic - before leaving on 21 September.

This week, the person sought medical care after feeling unwell and a subsquent test for Covid-19 returned a weak positive result.

An acute non-Covid-19 respiratory illness can sometimes create a situation where residual Covid-19 virus particles are detected when a sample is taken.

However, the ministry says there is no risk to the public and international research shows people with a historical Covid-19 infection are not infectious.

As a result, the ministry says no further management of close or casual contacts is required.

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