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Accuracy of 2 PCR test done apart 3 days

Answered by: Dr Nur Syuhada binti Zulkifli

Last Updated: January 25, 2021 3:48 AM

Anonymous 31 days

Hi Doctor,
A friend of my done a PCR test on 20th which came back as POSITIVE, while on the 22th he done another PCR test which returned back as NEGATIVE. While result is consider as a more accurate?
Prior the date before 20th he had been self isolated inside his room, he show no symptoms at all.
What is the risk of those close contact who stay together?

Dr Nur Syuhada binti Zulkifli 31 days
General Practitioner

Thank you for your question.

We understand your worries especially regarding the close contact to a positive COVID-19 patient. For your information, COVID-19 screening is usually subjected to patients that have experienced an ongoing fever. Although the criteria may change according to the situation, it is best that you seek immediate help from the nearby clinic or hospital as soon as possible. As far as I’m concerned, once you are considered a close contact to a positive coronavirus patient, you are required to do COVID-19 screening as well.

Want to boost your body’s immunity? Supplements are always a viable option!

Additonally, WHO listed common symptoms for COVID-19 infection as follows:

  • Fever (more than 37.5 degrees Celcius)
  • Fatigue
  • Cough
  • Aches and pains
  • Sore throat
  • Headaches
  • Shortness of breath

However, the onset of these symptoms may vary according to different individuals, ranging from few days to about 2 weeks after the virus transmission. On top of that, there were cases of asymptomatic carrier. Those that are able to transmit the virus without having any symptoms or complication of their own.

According to the Ministry of Health, close contact refers to either:

  • Health care-associated exposure, including providing direct care for 2019-nCoV patients, working with health care workers infected with 2019-nCoV, visiting patients or staying in the same close environment of a 2019nCoV patient.
  • Working together in close proximity or sharing the same classroom environment with a with 2019-nCoV patient
  • Traveling together with 2019-nCoV patient in any kind of conveyance
  • Living in the same household as a 2019-nCoV patient

I would also encourage you to answer this quiz on Risk Assessment for COVID-19 to evaluate their health status in regards to this disease. After completing this quiz, you will be classified into several categories. Further instructions will be given at the end of the quiz. Please act accordingly.

Meanwhile try to maintain physical and social distance between close friends and family members. You may also click on this link to directly request a COVID-19 screening test from us.

But if you want to seek a second opinion, you may try to contact the Crisis Preparedness and Response Centre (CPRC). Other than that, do practice good hand hygiene and normalize wearing face mask in public.

CPRC contact:

In need of a second opinion? Our pulmonologist are here to help.

Click on this link (DoctorOnCall) to talk online with our certified doctors. Thank you

Last Updated: Mon Jan 25 2021 03:48:59 GMT+0000 (Coordinated Universal Time)
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