In line with Android M requirements, going forward, Android N devices will not ship with WV Classic clients. Effectively, starting with Android 6.0, there is no expectation of a Widevine Classic client to exist on any Android device.
Mupirocin, sold under the brand name Bactroban among others, is an antibiotic useful against superficial skin infections such as impetigo or folliculitis. It may also be used to get rid of methicillin-resistant S. aureus (MRSA) when present in the nose without symptoms.
In brief: Bacteria vs virus. Very good question. Mupirocin (bactroban) is an antibiotic that is often used for bacterial based skin infections like impetigo. Shingles is caused by a virus, herpes zoster, and requires antiviral medications.