Senior citizens over the age of 65 are being targeted to get the “high-dose” flu vaccine. “Containing four times the amount of antigen (the part of the vaccine that causes the body to produce antibody) in regular flu shots, high-dose flu shots, along with the additional antigen produced, are intended to create a stronger immune response.”
But there seems to be a problem. Or not. You just can't tell what's what from reading this.