Your phone rang. It was an unknown number. Probably scams, you thought, so you declined the call. Then it went off again. The screen shows it's from the local disease control department. You have been taking PCR tests regularly as required, they shouldn't have any reasons to call you, but you decided to pick up.
"Hello. Is this [insert-your-full-legal-name-here]?" a male voice said.
"Yes."
"According to our records you have been close to the shopping mall nearby; now there's someone who've caught COVID and also have been close to the shopping mall, so you're under suspect of COVID."
"Wh-wha, huh?"
You were fairly certain you haven't left your apartment compound for weeks after they decided to setup a temporary PCR test location downstairs. You also knew that there's another PCR test location right next to the shopping mall; that's where you would go for PCR tests before. After that you never had a reason to go that far outside (you work from home anyway), so you never did. Strange.
"I said, you are under suspect. You need to go and take a PCR test from designated places for people with yellow code."