Williamson is due to leave on Thursday to link up with the Hyderabad Sunrisers in the United Arab Emirates, which is hosting the tournament this year due to the growing number of infections in India.
The IPL said last Saturday that 13 members of the Chennai Super Kings, including two players, had tested positive for COVID-19 after arriving in the UAE and had been placed into isolation.
“Obviously that’s bad news,” Williamson told Radio New Zealand on Wednesday. “You don’t want to hear anybody (has) COVID.
“There’s a little bit of apprehension, certainly as you get nearer to the time … you start thinking you do have to be extremely vigilant and disciplined.”
Players have also been warned about breaching their bio-security bubble during the tournament, that starts on Sept. 19.
New Zealand’s men’s team have not played since March when their limited overs series in Australia was abruptly postponed because of the coronavirus outbreak.