https://en.wikipedia.org/wiki/Green_Tobacco_Sickness

"Green Tobacco Sickness (GTS) is a type of nicotine poisoning caused by the dermal absorption of nicotine from the surface of wet tobacco plants.[1] Tobacco harvesters, whose clothing becomes saturated from tobacco wet with rain or morning dew, are at high risk of developing GTS. Workers can avoid getting this sickness by waiting to harvest until the tobacco leaves are dry, or by wearing a rain suit. Wet clothing that has come in contact with tobacco leaves should be removed immediately and the skin washed with warm soapy water."

How wet and green do some people ship pipe blends? Would you have to let that sit out for a fortnight before packing a bowl?