Donald Trump was seen without a mask as he returned to the White House and posed mask-free for a photo-op on the White House balcony.
This was viewed as flouting the rules set by his own administration which has encouraged Americans to be very careful and take precautions to avoid contracting and spreading the disease.
So far more than a dozen of his aides have tested positive for the virus, including his wife, senior adviser, personal assistant, campaign manager, two debate prep advisers, party chairwoman, and three Republican senators.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19 including symptoms, prevention and available treatment, please refer to the World Health Organisation or your national healthcare authority.