"Yesterday's PCR (#COVID19) test result was negative, today's is positive", Castro said on Twitter on Sunday.
She added that a medical examination confirmed that she only has mild COVID-19 and that she plans to continue working remotely.
On Saturday, Turkish President Recep Tayyip Erdogan said on Twitter that he and his wife had received positive COVID-19 test results, but were only exhibiting mild symptoms. The Turkish leader specified that they had contracted the Omicron variant.