Some folks in Yunnan have naturally developed antibodies against coronavirus due to their proximity to bat caves.
Could this be the reason why Vietnam has zero death cases? This following piece of news looks interesting.
https://www.livescience.com/6-new-coronaviruses-found-bats.html
It's possible. Those bat poo collecters in Siamkok seems to be immune too.
MARCH 16, 2020 / 1:59 PM / A MONTH AGO
Bat guano collectors in Thailand undeterred by possible link to coronavirus
Juarawee Kittisilpa
RATCHABURI, Thailand (Reuters) - Thai villagers scouring a dark cave for bat guano, sought after by farmers as a nutrient-rich crop fertilizer, are undaunted by scientists’ suggestion that it could be behind a coronavirus that has infected more than 150,000 people worldwide.
The source of the virus remains a matter of debate after it emerged in China late last year, but some scientists believe it could have originated in bats before passing to humans, perhaps being transferred through another animal.
But that link is not a concern for Jaew Yaemjam, a collector of bat droppings in Thailand’s western province of Ratchaburi, even though the southeast Asian nation has recorded 114 virus infections and one death.
“No, I’m not worried because the virus didn’t originate from here,” said Jaew, 65, who is one of several villagers making the nightly trek into a smelly cave near a Buddhist temple, Wat Khao Chong Phran, to fill their sacks with the droppings.
