Getting more people to test for HIV and start treatment at the right time could have a big impact on the number of new infections in the UK, which are among the highest in Europe.
Within two hours of the start of his test, he had surpassed by 0.6secs the fastest time set by Renault number two Vitaly Petrov in two days in the car on Thursday and Friday.
Sorensen was forced off at half-time with a neck injury and, after the re-start, Villa immediately looked to test his replacement Steve Simonsen with a series of aerial balls into the box.
The Wales centre is in just his second season as a full-time professional and at 22, he will be the youngest Lion to start Saturday's first Test in Durban.