The MEC for the Department of Health for the Province of KwaZulu-Natal v Denise Franks

On 31 August 2000, Ms Franks (the respondent) was a passenger in a vehicle that collided with a pedestrian, Mr Mthalane, on the N3 highway near Mooi River Toll Plaza, killing him. Ms Franks suffered skull fractures and lacerations to her scalp. Two paramedics employed by the MEC for the Department of Health (the appellant) attended to her at the scene and transported her to hospital. She was discharged on 5 September 2000. Approximately three weeks later she experienced symptoms, and another three weeks later was diagnosed with HIV. Based on the window period for HIV infection (three to six weeks), she concluded she must have been infected at the collision scene by the paramedics transferring blood from the deceased to her open wounds. She brought a delictual claim against the appellant based on vicarious liability for the paramedics' alleged negligence. The respondent alleged that the deceased was HIV positive and that the paramedics negligently caused transfer of the virus from the deceased's body to hers. The KwaZulu-Natal High Court (Patel J) found in favour of the respondent.

• Whether the respondent established on a balance of probabilities that the deceased was infected with HIV
• Whether factual causation was proven - i.e., whether the appellant's employees negligently caused the transfer of HIV from the deceased to the respondent
• Whether inferences drawn from circumstantial evidence met the required standard of proof in civil matters
• The proper approach to drawing inferences from facts in civil litigation

The appeal was upheld with costs, including costs of two counsel. The order of the court below was set aside and replaced with an order dismissing the plaintiff's action with costs, including costs of two counsel.

In civil cases based on circumstantial evidence, the plaintiff must prove their case on a balance of probabilities by establishing facts from which the most natural, plausible and acceptable inference supports their case - mere speculation is insufficient. An inference must be consistent with all proved facts and be tested against those facts. Statistical prevalence of a condition in a population does not, without more, establish on a balance of probabilities that a specific individual within that population has that condition - where prevalence is 30%, it remains more probable than not that a random individual does not have the condition. Drawing an inference from an inference (using a conclusion about one fact to support an inference about another fact) amounts to improper circular reasoning. An appellate court may interfere with a trial court's credibility findings where those findings are plainly wrong or affected by misdirection, particularly where objective documentary evidence contradicts the findings. In delictual claims, factual causation must be established as an essential element - failure to prove that the source of harm (here, the deceased) possessed the harmful agent (HIV) is fatal to the claim.

The court observed that expert evidence on what inferences should be drawn from non-technical facts (such as entries in a diary) is inadmissible - drawing such inferences is within the exclusive domain of the court, not expert witnesses. The court noted that it would have been a simple matter for the respondent's legal representatives to investigate the telephone numbers in the deceased's diary and present the results to the court, but this was not done. The court commented that based on expert evidence about HIV viability outside the body under the specific conditions at the collision scene (time elapsed, ambient temperature, viral load in congealed blood), the chances of viable virus transfer were 'as small, if not smaller, than at the average dental surgery or casualty ward.' The court noted that inconsistencies in witness testimony on lesser issues are to be expected when witnesses testify almost five years after the event and should not automatically affect credibility on core issues.

This case is significant for its detailed exposition of the proper approach to inferential reasoning in civil cases in South African law. It clarifies the adaptation of the criminal standard in R v Blom to civil matters as set out in Ocean Accident and Guarantee Corporation Ltd v Koch - that in civil cases, one may select the most natural or plausible conclusion from several conceivable ones, even if not the only reasonable one, but this does not permit pure speculation. The judgment emphasizes that statistical prevalence alone (even high prevalence like 30% HIV infection rate) cannot support an inference that a specific individual falls within that statistical group. It also reaffirms principles regarding when appellate courts may interfere with trial court credibility findings - where findings are plainly wrong or based on misdirection, the appeal court is at large to make its own findings. The case demonstrates the high standard required to prove factual causation in delict cases based on circumstantial evidence, and that failure to establish an essential element (here, that the deceased was HIV positive) is fatal to a claim.