My grandfather worked on the bomb that was dropped on Hiroshima, and it troubles me.

It also troubled some of the scientists who developed it.

Find out more in the bomb, a brand new podcast from the BBC World Service, available now.

Hello, I'm Nula McGovern and we're bringing you BBC OS, conversations about coronavirus here on the BBC World Service.

As society grapples with the long-term effects of COVID-19, people in South Africa, New Zealand and Canada share

similar experiences of persistent illness months after their initial

diagnosis. Plus, the American teacher who decided to resign rather than return to work.

Classrooms are just perfect places for COVID to spread.

You're in a closed indoor environment is generally a pretty poor ventilation and

you're there for eight hours.

There remains much to learn about the coronavirus, especially when some people, like this listener,

report symptoms that extend beyond what was expected.

My name is Rababusain and I'm from Bangladesh. My family and I'm from Bangladesh.

My family and I contracted COVID sometime around the end of July.

But of all my family members, I probably had the worst symptoms. I had the most intense cough and body aches I had the highest

fevers and I completely lost my sense of smell and taste.

My family members, they lost their taste for like a day or two and

then it was back to normal for them, but for me it properly lasted one week where I couldn't taste anything at all and I remember

one night we had ordered chicken tika which is one of my favorite foods and I could not even swallow a second bite of it

because it tasted so bitter and just felt like cardboarded my mouth

on the 15th day since the onset of my first symptoms,

I realized that I still hadn't regained my sense of smell

...