As South Africa heads into flu season, businesses are being warned to prepare for a significant hit to productivity, with absenteeism alone costing the economy an estimated R19 billion each year[i] — but the true cost likely far higher.
New insights into workplace health trends show that flu-related illness contributes to approximately 4.5 million lost workdays annually in South Africa[ii]. However, experts say this only reflects part of the problem, with a much larger and less visible cost linked to employees continuing to work while unwell.
“The real impact of flu season on businesses is often underestimated,” says Lance Blumeris of Unu Health. “Sick leave is the visible cost, but presenteeism — where employees work while sick — can have an even greater effect on productivity and overall business performance.”
Research indicates that presenteeism may cost businesses up to four times more than absenteeism, potentially pushing the total economic impact of flu season into the tens of billions of rand each year. Separate estimates suggest that reduced productivity from unwell or disengaged employees could cost the South African economy as much as R80–R90 billion annually[iii].
Flu season in South Africa typically begins in late April and peaks between May and August, placing sustained pressure on businesses across sectors. During this time, companies often experience staff shortages, increased workloads, and disruptions to operations.
“Even short periods of absenteeism can create significant challenges, particularly in smaller teams or high-demand environments,” says Blumeris. “But when employees continue working while unwell, productivity drops, recovery takes longer, and illness can spread more easily through the workplace.”
According to the World Health Organization (WHO), seasonal influenza affects up to one billion people globally each year, contributing to widespread absenteeism and economic strain. The 2026 flu season is expected to include circulating strains such as A(H1N1), A(H3N2), and B/Victoria lineage viruses, which continue to drive seasonal outbreaks[iv].
Despite this, many employees are choosing to work through illness due to financial pressure, workload demands, or concerns about falling behind.
“There is a growing culture of pushing through illness,” Blumeris notes. “But this often results in longer recovery times and greater disruption in the long run.”
Experts emphasise that early intervention and access to care can play a critical role in reducing the impact of flu season. Addressing symptoms early not only supports faster recovery but can also help limit the spread of illness within teams.
“Flu season shouldn’t be seen as an unavoidable disruption,” says Blumeris. “It’s something businesses can manage more effectively by prioritising early care and making healthcare more accessible to employees.”
As organisations place increasing focus on productivity and employee wellbeing, flu season is being recognised as more than just a health concern — but a key business risk with measurable financial consequences.
“Health and productivity are closely linked,” Blumeris concludes. “Businesses that take a proactive approach to managing flu season will be better positioned to protect both their workforce and their bottom line.”
