I do not think any serious second wave will come, but I have low certainty about it. My communicator with Virus Bug High Command ran out of batteries.
Every virus outbreak in history has had a second wave when cold temps return and people pack inside. The flu virus returns every year.
Only way we can be rid of the virus is to make sure no one has it at one time. But it's impossible to have all governments lock down all citizens until there are no more infected.
There is such a thing as collective immunity. 60% of the population must be ill to develop this immunity.
Not only the second wave will come, it will be every winter-spring. But no one will close people home for every two or three months.