Related Experiment Video
Updated: Mar 20, 2026

Assays for the Specific Growth Rate and Cell-binding Ability of Rotavirus
Published on: January 28, 2019
Rotavirus-associated disease burden and clinical severity in vaccine-naive Chinese infants: A synthesized Bayesian
Di Liu1, Bing Zhang1, Changhong Shi1
1School of Public Health, Guangzhou Medical University, Guangzhou, China.
Insights
Rotavirus (RV) infections are common in Chinese infants but mostly mild. Current surveillance misses many cases, highlighting the need for RV vaccination in China.
Area of Science:
- Epidemiology
- Infectious Diseases
- Public Health
Background:
- Rotavirus (RV) is a primary cause of severe diarrhea in children globally.
- Limited data exists on the true burden and clinical severity of natural rotavirus infection in China.
- Unvaccinated Chinese infants are the focus for understanding RV disease progression.
Purpose of the Study:
- To estimate the incidence and clinical spectrum of rotavirus infection in unvaccinated Chinese infants.
- To quantify the burden of rotavirus disease beyond severe or hospitalized cases.
- To inform rotavirus vaccine policy in China.
Main Methods:
- Utilized pooled data from placebo arms of rotavirus vaccine clinical trials in China.
- Employed a six-state burden pyramid model to represent disease progression.
- Applied a Bayesian framework to estimate transition probabilities and disease metrics.
Main Results:
- Analyzed data from 11,235 infants, with 20,248 observations.
- Estimated an annual rotavirus infection rate of 495.8 per 1,000 infants.
- Reported low progression rates: 10.3% symptomatic, 4.1% severe, 1.5% hospitalized, 0.09% fatal.
Conclusions:
- Natural rotavirus infection in infants is frequent but often subclinical.
- Surveillance focusing only on severe or hospitalized cases significantly underestimates rotavirus burden.
- Findings support the integration of rotavirus vaccines into China's national immunization program.
Objectives:
Despite rotavirus (RV) being the leading viral cause of childhood diarrhea in China, burden estimates and severity profiles associated with natural infection remain limited. We aimed to quantify RV burden and clinical progression among unvaccinated Chinese infants using vaccine clinical trial data.
Methods:
We pooled efficacy and immunogenicity data from placebo arms of RV clinical trials conducted in China. A six-state burden pyramid (susceptible, infected, symptomatic, severe, hospitalized and dead) described the natural history. We used a unified Bayesian framework to estimate transition probabilities between adjacent states and derived RV-associated burden and clinical severity metrics. Sensitivity analyses restricted the dataset to trials with > 3000 observations and to infants enrolled at 6-16 weeks.
Results:
We included 20,248 observations from 11,235 eligible infants. We estimated an annual RV infection rate of 495.8 (95% credible interval [CrI]: 314.1-782.8) per 1000 infants. Only 10.3% (4.8-21.8), 4.1% (2.0-8.5), 1.5% (0.8-2.9) and 0.09% (0.02-0.5) of infections progressed to symptomatic, severe, hospitalized and fatal cases over one year.
Conclusion:
Natural RV infection is frequent but predominantly subclinical, indicating that surveillance based on severe or hospitalized cases underestimates the true burden. Our findings support RV vaccine introduction in China's national immunization program.
Related Concept Videos
Bacterial Gastroenteritis
Cytomegalovirus Disease
Viral Meningitis
Vaccinations
Cholera
Arboviral Encephalitis

