Yes, prevention is the key
Sterile water contains no bacteriostat, no antimicrobial agent, and no added preservative
(8) A A Maslennikov, V F Kamenev, and V M Kolomiets (2007) [Immunological correction in progressive pulmonary tuberculosis] Probl Tuberk Bolezn Legk, 2007: (9), Pages 30-3
This combination approach is theoretically sound but has not been formally studied
[9] That is an actual clinical regimen, not a research convention
When side effects do occur, they are typically mild and may include temporary redness, itching, or sensitivity at the application or injection site