No, you're not callous. You are just damn ignorant. What you need is a little compassion and try to imagine if you are that poor person and that you mom now gets sick and now try to think should she die just because there's no cheap vaccine ,should she die so that she can sacrifice herself and you can be productive writing your damn programs because you don't need to take care of her. Think About it. Think about it in these people's shoes. They are human beings like you and me. Their sufferings are real. You're saying you can't feel this in your heart? just because you're born in a rich country and all the resources? Yeah, you need to get out of your little world and try to understand not everyone is as lucky as you. And they deserve EVERYTHING you deserve. They shouldn't just die.