Tom hanks announces positive test for coronavirus
I'm not aware of any information that suggests Tom Hanks has announced a positive test for coronavirus. It's possible that you may be thinking of another celebrity or public figure who has tested positive for the virus.
However, Tom Hanks and his wife Rita Wilson did test positive for COVID-19 in March 2020 while in Australia, where they were filming a movie. They announced their diagnosis on social media and were later cleared of the virus after recovering.
It's worth noting that celebrities and public figures often use their platforms to raise awareness about important issues, including public health crises like the COVID-19 pandemic. If Tom Hanks were to announce a positive test for coronavirus, it would likely be a significant news story and would be widely reported by the media.