Pollock gained a BSc in physiology at the University of Dundee in Scotland then became a medical graduate of the same university. She later completed an MSc at the London School of Hygiene. She became a consultant in public health medicine in 1986.
Allyson Pollock has provided evidence to the British Parliament and the Welsh National Assembly regarding PFI. Under her directorship CIPHP provided evidence to the Scottish Parliament regarding PFI. In their statements of evidence, Allyson Pollock and her co-researcher Mark Hellowell argue that capital investment through PFI creates a large public sector cash liability. For example, they say that the £5.2billion of PFI investment in Scotland has created a public sector cash liability of £22.3bn. This cash liability is 'off balance-sheet' and does not show up on government statistics such as the Public Sector Borrowing Requirement. Pollock and Hellowell also say that, although the UK government's support for PFI is based on its supposed ability to deliver good value for money, the mechanisms for testing this are skewed. While developing PFI proposals, contracting authorities such as NHS trusts are required to construct a theoretical alternative to the use of PFI, which compares the value for money offered by a public versus a private finance scheme. The publicly funded alternative is called a 'public sector comparator'. In theory, if this exercise concludes that PFI does not represent good value for money compared to public finance, then the latter should be used for the procurement. However, in practice this rarely happens. The reasons for this are discussed in a paper co-written by Pollock and published in the BMJ. Pollock et al. conclude that the true risks of many privately financed contracts are not calculated correctly. They argue that the system involves a high degree of subjectivity regarding the value of the risk being transferred to the private sector. They take one example of an NHS project in which one of the risks theoretically being transferred was that the target for clinical cost savings would not be met. The cost of this risk was estimated at £5m. However, in practice the private consortium had no responsibility for ensuring that there would actually be clinical cost-savings, and faced no penalty if there were none. The paper concludes therefore that the risk transfer was "spurious". Jeremy Colman, former deputy general of the National Audit Office and the current Auditor General for Wales has supported Pollock's findings. In a Financial Times article he is quoted as saying many PFI appraisals suffer from "spurious precision" and others are based on "pseudo-scientific mumbo-jumbo". Some, he says, are simply "utter rubbish". He noted the pressures on contracting authorities to weight their appraisal in favour of taking their projects down the PFI route: "If the answer comes out wrong you don't get your project. So the answer doesn't come out wrong very often."
School rugby injuries
Pollock’s son played rugby and suffered serious injury on three occasions before the age of 16: a broken nose, a fractured leg and a fractured cheekbone with concussion. Following this she has spent more than a decade researching the risks involved. In 2014 she said "rugby union in schools must distinguish itself from the very brutal game practiced by the professionals." She criticised poor monitoring of injuries sustained during games played by school children. She cited research from Ireland which found that in children of secondary school age the rate of injury in rugby was three times higher than other sports. In the course of a season, children have a 20% chance of concussion or bone fracture and one in seven parents have considered withdrawing their child from the games. In March 2016, Pollock was one of more than 70 doctors and academics who were signatories to an open letter seeking a ban on tackling in school level rugby matches. This group set out details of the risks involved in the letter addressed to ministers, chief medical officers and children's commissioners in England, Scotland, Wales, Northern Ireland and the Republic of Ireland. World Rugby, the sport's governing body, responded by releasing the results of a survey that stated 92% of parents of children aged between seven and 18-years-old believed that the benefits of children playing sport outweighs the risks.