Why Vaccine Disorders Can Help Strengthen Immunity We should have a better idea soon. A number of trials are underway to test the potential of vaccine combinations, and the first results will be finalized this month. If these mixed regimes prove to be safe and effective, countries can continue to move the spread of vaccines, even if the supply of a vaccine is reduced due to manufacturing delays, unforeseen deficiencies or safety issues. But there are other exciting solutions that could be a key component of our strategy in the future: vaccine disorders can lead to broader immunity and prevent viruses from trying to prevent our immune system. In the end, a mixed and matched approach may be the best way to protect ourselves.