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Viral transmission and spread 
of disease

The SARS-CoV-2 virus can be transmitted between people when they cough, sneeze, talk, or breathe. The infectious respiratory particles (droplets or aerosol) contain the virus and can either be transmitted directly to another person, or indirectly through droplets on surfaces. The viral particles can enter the nose, mouth, or the eyes, infecting the body and causing disease.1

There are many factors that can affect SARS-CoV-2 transmission between individuals and within populations, from the communicability of each new variant, to social behaviours within communities.1,2

By studying these individual and population factors, we are building a clearer picture of how COVID-19 spreads, helping us to create interventions that may help to reduce infections and save lives.1

Transmission between adults and children 

SARS-CoV-2 transmission in multigenerational households plays an important role in spread of the disease.

 Watch the video to learn how mild and symptom-free cases of COVID-19 in children have the potential to cause hospitalizations in older adults3-5 Explore more Pfizer vaccines

Learn more about mRNA COVID-19 vaccine options from BioNTech and Pfizer

 Explore LoadingReferencesReferences:World Health Organization. Coronavirus disease (COVID-19): How is it transmitted? Available at: https://www.who.int/emergencies/diseases/novel-coronavirus-2019/question-and-answers-hub/q-a-detail/coronavirus-disease-covid-19-how-is-it-transmitted (accessed January 2023). Mayo Clinic. Coronavirus disease 2019 (COVID-19). Available at: https://www.mayoclinic.org/diseases-conditions/coronavirus/symptoms-causes/syc-20479963 (accessed January 2023). About Vaccine types

Learn about different types of vaccines and how they may prevent disease

 Learn more Loading Help restore protection with bivalent boosters

Find out more about how adaptive vaccines may help to combat recent variants

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Adverse events should be reported. Reporting forms and information can be found at https://www.pfizersafetyreporting.com/#/en

 

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