The role of vaccines in public health has always been a hot topic, but it's not new. In the late 1800s, a Bengali prophet-astrologer wrote essays about the plague vaccine during a major outbreak in Calcutta. This prophet-astrologer had a lot to say about the plague vaccine. At first, he was not a fan. He wrote a piece that was pretty critical of the vaccine. But...

The plague, caused by the bacteria Yersinia pestis, has struck humanity three times in history. It's surprising that some strains, like biovar microtus, don't affect humans as much. This bacteria has a clever trick up its sleeve. It can survive and grow inside the immune cells of warm-blooded animals. This is crucial for its early stages of infection. A recent disco...