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Sub-Acute Phase: First Weeks During the sub-acute phase, which lasts from the end of the first few days to the first few weeks, symptoms generally decrease in intensity but can still be challenging

He T, Oks M, Esposito M, Steinberg H, Makaryus M (2017) Tree-in-Bloom: severe acute lung injury induced by vaping cannabis oil

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This water may produce vapor or steam, which may seem like smoke when it comes into touch with heated components

As such, in line with the TPDs regulations, the tank in each device must be capable of holding no more than 2ml of e-liquid, while the nicotine strength is also capped at 20mg/ml (20%)