Not automatically. The closure of the business depends on the number of employees tested positive, the exposure of these employees to others in the business and the area of the business affected.
If there is a positive case of Covid-19 in a workplace, the employer has to immediately notify the national department of health the National Department of Employment and Labour. These parties will decide whether closing the business is necessary. Even if the authorities determine that it is not necessary to close the business, a business may for operating reasons decide to temporarily close – such a decision is the business’ choice and no approval is needed from a third party for the business to reopen under such circumstances.