Major Adverse Cardiovascular Events refers to serious heart-related problems, such as a myocardial infarction, which is a heart attack, a stroke, or death caused by heart issues. Dementia describes a group of symptoms involving a decline in memory, thinking, and reasoning skills, including conditions like Alzheimer’s dementia or Vascular dementia. The vaccine is administered through an intramuscular injection, which is a shot given directly into a muscle.

Participants in this trial may receive the vaccine or a placebo. The study will follow individuals over a period of time to observe any changes in heart health or cognitive abilities related to the use of the vaccine.

The purpose of this study is to better understand how the immune system responds after receiving the recombinant herpes zoster vaccine. Specifically, the study will look at changes in certain immune system components that help fight the virus. These include cell-mediated immunity, which refers to immune cells that attack infected cells, humoral immunity, which involves antibodies that help neutralize the virus, and lymphocyte typing, which means identifying and counting different types of white blood cells that are important for immune defense. The study aims to examine a temporary change in specific immune responses that may occur after vaccination.

Participants will receive two doses of the vaccine given between two to six months apart. Blood samples will be collected at nine different times over a period of several months to measure how the immune system changes before and after each vaccine dose. The study will follow participants for approximately six months to track these immune responses over time. The measurements taken from the blood samples will help researchers understand the patterns of immune system activity following vaccination.

The purpose of this study is to assess how well the Shingrix vaccine works over a long period, how safe it is, and how long the immune response lasts in older adults. Participants in the study will receive one or two additional doses of the vaccine. The study will follow participants for several years to monitor their health and the effectiveness of the vaccine in preventing shingles.

Throughout the study, participants will have regular check-ups to track their immune response and any side effects. The study will also look at the number of confirmed cases of shingles among participants and measure specific immune cells and antibodies that help protect against the virus. This information will help determine the long-term benefits and safety of the Shingrix vaccine for preventing shingles in older adults.

The purpose of the study is to investigate whether replacing mycophenolate mofetil with everolimus in kidney transplant patients leads to a better immune response to the COVID-19 vaccine. Participants in the study will receive either mycophenolate mofetil or everolimus and will be monitored for their immune response to the vaccines. The study will also look at the levels of antibodies, which are proteins the body makes to fight infections, after vaccination. Additionally, the study will monitor for any side effects or complications that may occur during the trial period.

Participants will be involved in the study for a period of up to 18 months. During this time, they will receive vaccinations and have regular check-ups to assess their health and immune response. The study will also track any changes in kidney function and the occurrence of any adverse events, which are unwanted effects that may happen during the study. The goal is to determine if everolimus can provide a stronger vaccine response while maintaining the health and safety of kidney transplant patients.