Yeah think he mentioned there's a potential of that many if it's 1 in 1000 cases that result in death. Bit confusing to say that but perhaps it's their way of ensuring people avoid the social contact and ensure the social distancing they've been trying to promote. 55,000 is still a hell of a lot of people and say if that's true, you're more likely to come in to contact with one of them.
I'm also guessing that 55,000 takes in to account those individuals who may have it but also show no symptoms, but still be able to pass it on.