As of 17 December 2023, there have been 772 million confirmed cases of COVID-19 worldwide, including 6.9 million deaths, reported to the World Health Organization [2]
That said, consult your doctor if you have serious health issues
Most patients benefit from weekly B12 shots initially, then transition to bi-weekly or monthly maintenance based on their response and lab values
Potential Side Effects and Warnings Common Side Effects These are reported by at least Nausea Diarrhea Vomiting Constipation Abdominal pain Dyspepsia (indigestion) Gastroesophageal reflux disease (heartburn) Injection site reactions Fatigue Hypersensitivity reactions Hair loss As you can see, the gut is most often affected (gastrointestinal adverse reactions), but these are usually If, however, any of these side effects are severe, dont settle, or are impacting your life, you should ask for medical advice
If a deficiency does not exist, supplementing Vitamin B12 will likely not have the same positive effect. B12 injections are available, for $15 to $50 a pop, at spas and wellness centers, but its smart to talk to your physician before you spend money on them