One person four tests: two positive and two negative, point to unreliablity of testing.  Maybe the samples were taken at the beginning of the symptoms.  [I suppose being super rich allows you to get multiple testings done]

"BBC" wrote: Tech entrepreneur Elon Musk says he "most likely" has a "moderate case" of Covid-19 but has been "getting wildly different results from different labs". The boss of Tesla and SpaceX, who is 49, tweeted his symptoms were those of a "minor cold". On Friday he said he had been tested four times, with two positive and two negative results. Mr Musk appeared to play down concerns about the pandemic when it first hit.

The last bit shows again that this pandemic enjoys the opportunity to infect those who down play the seriousness of it.

https://www.bbc.com/news/world-us-canada-54948005 - https://www.bbc.com/news/world-us-canada-54948005

She had two covid tests done at the same time, one in each nostril. One came back negative, one came back positive.

http://people.com/tag/erykah-badu" rel="nofollow noopener - Erykah Badu is playing it safe.' data-reactid="12" style='margin: 0px 0px 1em; color: rgb(38, 40, 42); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial;' type="text"> http://people.com/tag/erykah-badu" rel="nofollow noopener" style="background-color: transparent; color: rgb(45, 144, 255); text-decoration: none; - Erykah Badu is playing it safe.

https://twitter.com/fatbellybella/status/1327324721701117952" rel="nofollow noopener - yielded conflicting results . Although one test, which used a swab from her left nostril, came back positive, a second tests, which used a swab taken from her right nostril, was negative for the novel coronavirus.' data-reactid="13" style='margin: 0px 0px 1em; color: rgb(38, 40, 42); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial;' type="text">The singer, 49, announced on Friday that she was taking her third COVID-19 test in 24 hours, after her previous two tests  https://twitter.com/fatbellybella/status/1327324721701117952" rel="nofollow noopener" style="background-color: transparent; color: rgb(45, 144, 255); text-decoration: none; - yielded conflicting results . Although one test, which used a swab from her left nostril, came back positive, a second tests, which used a swab taken from her right nostril, was negative for the novel coronavirus.

“No symptoms. Was tested for COVID. Same machine. Left nostril positive. Right nostril negative,”

https://www.yahoo.com/entertainment/erykah-badu-says-she-tested-210039703.html - https://www.yahoo.com/entertainment/erykah-badu-says-she-tested-210039703.html

If you're going to ask if they are accurate (my understanding is that the CDC has said they have never isolated virus - will try to find article with statement), then you need to ask how many cycles does lab run your test at?

“if someone is tested by PCR as positive when a threshold of 35 cycles or higher is used (as is the rule in most laboratories in Europe and the US), the probability that said person is infected is less than 3%, and the probability that said result is a false positive is 97%.”

https://greatgameindia.com/portuguese-court-pcr-tests-unreliable/ - https://greatgameindia.com/portuguese-court-pcr-tests-unreliable/

You also need to look at the risk of contamination within the lab: 

https://lockdownsceptics.org/false-positives-inflation-in-milton-keynes/ - https://lockdownsceptics.org/false-positives-inflation-in-milton-keynes/

Just some things to consider before you let the MSM convince you we're all gonna die... :-)

https://off-guardian.org/2020/11/20/portuguese-court-rules-pcr-tests-unreliable-quarantines-unlawful/ - Portuguese Court Rules PCR Tests “Unreliable” & Quarantines “Unlawful” – OffGuardian (off-guardian.org)