Oliver Conway

She remembers how in August when floods washed away a wooden bridge, Kamala jumped across rocks to reach her son.

People were not stepping out of their homes.

Even we were scared to go to the markets because of the heavy rains and destruction.

But still, Kamala came to vaccinate our child.

That is an act of real bravery.

Kamala is now giving the second dose to this baby.

A quick jab and it's done.

India is the world's largest vaccine manufacturer, yet its infant mortality rate is five times higher than the US.

Tamla worries that growing vaccine misinformation could make her work even harder.

If children miss their vaccines, they're at a greater risk of falling sick.

She barely makes $150 a month for this work.

But when I ask her if she's ready for her next trek, she nods and smiles, adding that for her the real power is in changing traditional mindsets, one vaccine at a time.

Davina Gupta in Himachal Pradesh.

Philip Pullman is one of Britain's most popular novelists thanks to his fantasy trilogy His Dark Materials and now the follow-up series The Book of Dust.

Well, the story of heroine Lyra reaches its conclusion this week with the publication of the third part of the second trilogy, The Rose Field.

Philip Pullman has been talking to our culture editor Katie Razzell about his much-loved protagonist, how AI algorithms are using his work and about truth in today's world.

It's a truth meter, and it works by means of the three hands, which are moved by these knobs like that.

Philip Pullman, in his tiny study, is showing me his alethiometer.

And then, once you've got your questions set up... A model of the truth-telling device he invented for his fictional heroine Lyra.

Well, we all need an alethiometer.