ITV said the individual is now self-isolating at home after returning the result last week.
Producers have had to really put their thinking caps on to help film the soap as safely as possible.
It turns out being on the set of the daytime soap was no walk in the park.
Social distancing has presented its challenges as TV production has resumed.
After former EastEnders star Alex Ferns popped up in the new Batman trailer, here's who else has made a name for themselves Stateside.
Actor Alex Ferns plays Gotham Police Commissioner Pete Savage in the upcoming film.
The soap has been off our screens for three months, and bosses have got plenty of drama in store to make up for it.
Todd was previously played by Bruno Langley, whose contract was terminated after he was accused of sexual assault.
The 2007 festive special is one of the soap's most iconic episodes ever, attracting over 14 million viewers.
It's still one of the BBC soap's most memorable moments ever.