According to analysts, Kennedy's anti-vaccine tendencies may weaken public trust in vaccines, leading to a decrease in vaccination rates in the USA, and increasing the risk of outbreaks of diseases like measles and whooping cough.

Specifically, Moderna's stock price dropped over 7% intraday, Novavax fell by 2.5%, Pfizer plummeted over 5%, while German pharmaceutical company BioNTech also saw a decline of over 5%.

Deutsche Bank analyst Emmanuel Papadakis has downgraded the ratings of some vaccine stocks. RBC Capital Markets analyst Brian Abrahams pointed out that Kennedy's appointment may have far-reaching and unpredictable effects on the biotechnology industry.

The day before, US President-elect Trump announced his nomination of environmental lawyer and vaccine skeptic Robert Francis Kennedy Jr. as Secretary of Health and Human Services. This prominent US public policy critic will take charge of the country's vast healthcare administrative agency.

Kennedy has pledged to comprehensively reform food and drug regulation as well as government-funded scientific research. He recently stated that the nutrition division of the US Food and Drug Administration (FDA) needs to be dismantled and warned the agency's employees to 'pack up and leave'.

The world is trying to understand what measures Kennedy will take to restrict vaccines. If his nomination is approved by the Senate, he will have a huge impact on the leadership and staff selection of the institutions responsible for developing, approving, recommending, distributing, and stockpiling vaccines.

It is reported that the budget of the US Department of Health and Human Services accounts for about a quarter of the federal budget, so this position holds significant control and influence over US public health policy and resource allocation.

Director Michael Osterholm of the Infectious Disease Research and Policy Center at the University of Minnesota pointed out that appointing Xiao Kennedy as the Minister of Health may further weaken public trust in vaccines.

Currently, skepticism about vaccines has already led to frequent outbreaks of measles and whooping cough in the United States. According to data from the Centers for Disease Control and Prevention (CDC), in the 2023-24 school year, the measles vaccination rate for kindergartens dropped to 92.7%. As of November 7, in just 2024, the United States reported 266 cases of measles.

Analysts point out that Xiao Kennedy himself has a strong anti-vaccine tendency. He has raised doubts about the safety of the COVID-19 vaccine, believing it to be the "deadliest vaccine ever."

Osterholm stated that as long as Xiao Kennedy expresses doubts about vaccines, it will create a significant social issue, and the vaccination rate in the United States will further decline. Vaccine scientists are concerned that Xiao Kennedy may allow those who criticize vaccines like him to enter committees overseeing immunization recommendations.

In recent interviews, Xiao Kennedy has said that he is not against vaccines himself, but wants to increase transparency and have parents consent to vaccination with informed knowledge.

CDC official Richard Besser stated that if the federal government advises states to let parents choose for themselves, epidemics will erupt, and children will contract measles or whooping cough from school.