Unfortunately whatever the PM (or any President/Government representative in any country in the world) announces, the virus is not going anywhere. The vulnerable ones in society shall continue to be vulnerable to Covid just as they are to influenza, Winter Vomiting Bug etc.
If they do develop a credible and effective vaccine for this strain/s, the chances are that next year it will mutate and therefore another vaccine shall be needed (like the flu vaccine some of us have each year the WHO and advisers decide what they think the strain will be for each year )
Stay Alert to me means a gradual return to life but constantly being aware of your own health and risk assessment of shops/situations.