The phrase "a second injection of" is correct and usable in written English.
It can be used when referring to a subsequent dose of a vaccine, medication, or similar substance.
Example: "After the initial dose, patients are advised to receive a second injection of the vaccine after three weeks."
Alternatives: "a follow-up injection of" or "a subsequent dose of".
A second injection of radiopharmaceutical (10 MBq/kg) was injected ≥10.1 min after the first injection, at the end of the second minute of adenosine intravenous infusion.
A control group of rats were injected with endotoxin-free saline, and they received a second injection of saline on day 21 (SAL + SAL).
Troubled retailer JJB Sports is preparing to ask shareholders for a second injection of cash, soon after an emergency fundraising launched on Christmas Eve.
Although a second injection of public money into the banking system may be unlikely, the government has proved itself adroit at devising bank rescue programs in disguise.
But Valentine was sitting in the third-base dugout laughing because he has gone almost a week without feeling pain after a second injection of epidural steroids into his spine.
Since then, the bad-debt problem has again increased, partly because of a surge in bankruptcies and debt waivers, and talk of a second injection of public money is on the rise.
Two weeks later, the patient received a second injection of 4 ml of 0.25% lauromacrogol solution.
But a second injection of clozapine appears to have helped the mice effectively separate the good and the bad memories.
To prolong the anti-tumor effect some mice were also given cyclophosphamide, hydrocortisone, or a second injection of virus.
Mares received a second injection of PGF2α on day 6 of the synchronized estrous cycle to induce luteolysis.
The process is quite simple and only needs three steps: buffer injection only, sample and buffer at the same flow rate, and a second injection of buffer only.
