US First Lady Jill Biden has testified positive for COVID-19, her communications director Elizabeth Alexander confirmed.

After testing negative for Covid-19 yesterday during her regular testing cadence, the first lady began to develop cold-like symptoms late in the evening

She tested negative again on a rapid antigen test, but a PCR test came back positive, the spokeswoman said.

President Joe Biden today tested negative for Covid-19, the White House confirmed.

Mr Biden had tested positive for the virus last month, having also only experienced mild symptoms.