I you ever see a snake, just make sure to avoid it. Use fire or something to make it go. If you ever get stuck with a Boa Constrictor, you need to know that these snakes eat people too, if they, the snakes, are big enough.
If one Boa bites you, don’t try to drag it out of your hand, because its teeth will go deeper into your hand as those teeth are oriented backwards. Best is to unfold the boa from the tale so that it won’t have a grab on you and then hold it by the head and push it towards your hand to release the grip.
Also, when a Boa squeezes you, you don’t die of asphyxiation, you die because the heart is squeezed too and it simply stops.
You need to know that poison and venom are two different things, as explained by Veritasium. So, there are no poisonous snakes, but there are venomous snakes.
Also, learn about leeches that are used in medicin. They seem to work for several uses cases where they inject anticoagulant and antiseptic into your system. They are also used to restart blood circulation: