Answer:

1. The Covid-19 pandemic has proved to be a severe threat to the stability of the world's economies and a big sacrifice for the healthcare sectors across the world.
2. We should stay at home to minimize the risk of infection from outdoors environments.
3. Always follow government-issued rules and practice social distancing.
4. If we all unite as one, no matter the distance between nation, economical status, or resource limitations, we can fight this together.
5. We all miss the old times, but this will all get better and cool down when things go back to normal.

Explanation:

For number 5, I just changed the tense of the verb "went", that specific clause should still have the same meaning.