Researchers have reasoned that getting jabbed in the same arm works better because immune cells in nearby lymph nodes, which ...

Our opinions are our own. Do you fly Delta Air Lines with someone at least once a year? If so, then this card should pay for itself. If not, look for a cheaper alternative.

Same-arm booster shots trigger a stronger early immune response than shots given in the opposite arm, leading to higher ...

Our opinions are our own. It can deliver value to Delta devotees, but thanks to its increased annual fee, it's not the no-brainer it used to be.

Sydney scientists have revealed why receiving a booster vaccine in the same arm as your first dose can generate a more ...