Hero Image

Infectious diseases

We are taking on infectious diseases with the hope of creating a better world

Our decades of research in infectious diseases have led to profound scientific advances

We’ve been combating global health threats caused by infectious diseases for more than a century. From developing one of the first antibiotics to pioneering research in HIV science, our focus has always been on the prevention and treatment of diseases that threaten people and communities around the world. But our work is far from done.


The world is counting on us to bring forward new approaches to help ease human suffering.

Our work in infectious diseases worldwide


years committed to research to help combat the challenges of the HIV epidemic


the year we began producing one of the first antibiotics


investigator-initiated antimicrobial stewardship programs funded across the globe


Our legacy in innovative HIV science continues

We remember when HIV was one of society's most daunting challenges, when millions of people lost their lives to the devastating AIDS epidemic. Our scientists embarked on an urgent mission to unravel and understand the virus, which led to groundbreaking research in HIV.

We are still driven to do more. We are pushing the boundaries of HIV science because unmet medical need still endures. Eradication of the virus is our ultimate goal.


Continuing research and striving for improvements in the use of antibiotics

While other companies pull away from antibiotic research and development, we stand out from the pack. We continue our efforts, because we know the world needs it.


 Joining a partnership to combat a deadly virus

Since the emergence of the Ebola virus in 1976, periodic outbreaks have been a global health challenge. We are proud to be part of the global public-private partnership that has united government, industry, community groups, scientists, health care workers and ordinary people, to come together to help fight this deadly disease.

Lessons from dual pandemics

A conversation with MSD Chief Patient Officer Julie Gerberding, M.D., M.P.H., about her early work caring for people with HIV and AIDS, and the parallels of the AIDS and COVID-19 pandemics

The Ebola outbreak in the Democratic Republic of the Congo (DRC) is declared over

The 11th Ebola outbreak in the Democratic Republic of the Congo (DRC) is declared over nearly six months after the first cases were...

Addressing antibiotic resistance is more critical than ever. Here’s why.

Since their development, antibiotics have transformed health care and saved countless lives globally. But rising levels of antimicrobial...

Three patients meet closed to a beach and hugging

Our commitment to patients is unwavering

As long as there are still patients in hospitals, doctors desperate to add years to the lives of their patients, and a world where treatments aren’t accessible to all, we will be here: fighting with all we have to deliver more, sooner.

MSD Data on File

American Chemical Society International Historic Chemical Landmarks. Discovery and Development of Penicillin. Available at: https://www.acs.org/content/acs/en/education/whatischemistry/landmarks/flemingpenicillin.html Accessed on: 03 Sept 2020

TAPS NA 13280 NZ-NON-00186 Last Updated October 2021