Unfortunately, the answer to this question should be 'no'.
Yesterday, our Prime Minister Charles Michel met the international press, claiming Belgium was again 'a safe country'.
I wouldn't dare to go as far. Who can foresee what might happen? If we could do this, we'd all have what we wanted...
The only thing you can do is try to keep everything as safe as possible. This goes for nearly everything.
Most people think their house is a safe place. But if you check the records, most of the fatal accidents occur just at this home... A fall off the stairs, slipping on something in the kitchen, a kid pulling a pot with boiling water (or oil) of the fire, ....
Driving a car is just as dangerous. Many accidents there too.
The chance of falling victim of an explosion (by bomb) is much smaller than any of the above mentioned.
So no, there are no safe places, but we should all keep our eyes open and be aware of the risks we are taking. Awareness makes you less of a victim