In a first, UK authorities are conducting clinical trials for a cancer vaccine—something that could transform healthcare globally. The vaccine is personalized for each patient and is the culmination of decades of research, according to the World Economic Forum. This comes less than a month after researchers from Oxford University were awarded funding to create the world’s first vaccine to prevent ovarian cancer. Named OvarianVax, this vaccine teaches the immune system to recognize and attack the earliest stages of ovarian cancer. Other existing cancer vaccines target the hepatitis B virus (HBV), like Heplisav-B, and the human papillomavirus (HPV), such as Gardasil.How Important Is This Vaccine?Cancer is the leading cause of death worldwide. According to the World Health Organization (WHO), it was responsible for nearly 10 million deaths in 2020. The most common sites for this chronic disease are the breast, lung, colon, rectum, and prostate. If successful, this pioneering cancer vaccine could have a major global impact. By 2023, around 10,000 people could receive personalized cancer treatments through the UK’s National Health Service.As reported by BMJ, 30 British hospitals had signed up to be part of the Cancer Vaccine Launch Pad, 2 a scheme to enrol NHS patients in messenger RNA (mRNA) cancer vaccine trials. The vaccine, which was developed by the German biotechnology company BioNTech, is designed to present tumour markers to the patient’s immune system and thereby trigger an immune response that will target cancer cells specifically.How Does This Cancer Vaccine Work?What sets the UK’s cancer vaccine apart from existing ones is that it is not intended to prevent cancer but to treat patients with existing tumours. It is designed to help the immune system recognize what cancer cells "look like." This revolutionary form of immunotherapy helps the body identify, destroy, and prevent the spread of existing cancer cells.Are There Any Side Effects of These Vaccines?While cancer vaccines are generally well-tolerated, they can cause side effects as the immune system responds to the treatment. A person taking these vaccines may experience several symptoms that include flu-like symptoms such as fever, chills, fatigue, and headaches. Some patients may also experience myalgia (muscle pain), joint aches, and back pain.It's important to note that these reactions are typically mild and short-lived, often resolving on their own. However, patients should be aware of potential side effects, such as prolonged fatigue, and report any concerning symptoms to their healthcare provider.