Yes, but how many of that 61% regularly used public transport in the first place? I wouldn't be at all surprised if those who are used to travelling around in their own personal metal cocoons would be frightened of using public transport. What that figure doesn't tell us is what percentage of regular public transport users are not prepared to go back to using it.
The other question is, whilst that may be the case now, will that still be the view of those people once we have a vaccine and/or treatments which significantly reduce the risk of death?
Whilst there's talk of people abandoning public transport, the assumption from many is that will result people switching to car use. Like it's the only choices are car or public transport.
One of the reasons people opt for public transport is to avoid the bad weather which we see. Now given that we can see what the likely weather forecast is for a week in advance, then it could be that people could avoid the worst of the bad weather by working from home.
However, even if that's not possible, even knowing that you'll only be getting wet (at most) two days a week would make walking/cycling less of a bad experience for many.
Another reason for opting for public transport is because it saves time compared walking/cycling, now again if you are saving time out of the house by not having to go into the office so much then that time could be redistributed.
For instance rather than leaving the house at 8am and returning at 6pm with a 30 minute journey time at each end of the day, people could then work 8:15-5:45 from home and 8:45-5:15 (with 45 minutes journey time at each end of the day) when in the office. In doing so their hours are done, but aren't out of the home any more than they currently are.