The war on panic: Hantavirus scare tests post-Covid defences against disinformation and conspiracies

A hantavirus outbreak on the luxury cruise ship MV Hondius in the Atlantic has reignited fears reminiscent of the Covid-19 pandemic, with three deaths and 11 confirmed cases among passengers as of May 15. Health officials are struggling to communicate risks effectively while countering misinformation, as social media amplifies unfounded panic about lockdowns and unproven treatments like ivermectin. The Andes strain of hantavirus, which has circulated in Argentina and Chile for decades, is not new but remains poorly understood by the public. The European Centre for Disease Prevention and Control (ECDC) and other agencies are prioritizing transparent, evidence-based messaging to avoid repeating Covid-era mistakes, such as delayed responses and contradictory guidance. Gianfranco Spiteri, ECDC’s emergencies lead, noted that governments must balance urgency with reassurance, acknowledging uncertainties while preventing unnecessary fear. Expert opinions vary, but most agree the outbreak is serious but containable. Gustavo Palacios, a hantavirus specialist at Icahn School of Medicine at Mount Sinai, stressed that while outbreaks require attention, they do not pose pandemic risks. Laboratory tests confirm the virus matches known strains, and established control measures—such as quarantine and monitoring—are being applied. Dozens of passengers returning to 20 countries remain under observation, though no secondary cases outside the ship have been reported. Misinformation remains a challenge, with false claims linking hantavirus to the Pfizer vaccine or suggesting it is a pharmaceutical hoax. Sander van der Linden, a misinformation expert at the University of Cambridge, urged better public education on evaluating health information. Meanwhile, Illinois’ health department warned against panic, urging people to read full updates before spreading unverified fears. Gabby Stern, former WHO communications chief, observed improvements in transparency since Covid, though lingering distrust complicates efforts. A 2022 study showed declining trust in public health institutions across 20 of 27 EU nations, underscoring the need for clearer, empathetic communication. Officials emphasize that while the outbreak demands attention, it does not justify extreme measures.