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For individuals sourcing either compound from unregulated online vendors, additional risks include contamination with unknown substances, incorrect dosing due to inaccurate labelling, and the use of non-sterile injection equipment, which can lead to serious infections including abscess formation or sepsis

Severe reactions at vaccine injection sites may be characterized by severe pain, extensive swelling, persistent redness, or the emergence of a rash or bleeding

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Retrieved 9 November 2019

This equalizes pressure inside the vial and makes it easier to draw liquid

If you have pernicious anemia, malabsorption, or prior gastric surgery, your gut cant absorb pills well enough