Research suggests that how a body reacts to a vaccine is altered by the type of microbiome a person has. Studies on the Covid-19 vaccine, for example, suggest it affected the snot's microbiome, and in turn, the microbiome affected how efficient the vaccine was.

I hope those researchers get paid extra.

The researchers asked 22 adults to shoot themselves up the nose with a syringe full of snot from healthy friends and partners each day for five days. They discovered that symptoms like cough and facial pain, for instance, dropped by almost 40% for up to three months in at least 16 of the patients.

There's no way those 22 could have been paid enough.