Basic Reproduction Number

Disease Transmission, Infectious

Disease Outbreaks

Epidemics

Communicable Diseases

Models, Theoretical

Influenza, Human

Models, Biological

Models, Statistical

Insect Vectors

Reproduction

Computer Simulation

Communicable Disease Control

Population Dynamics

Quarantine

Influenza A Virus, H1N1 Subtype

Pandemics

Time Factors

Seasons

Basic reproduction number

Transmission coefficient (epidemiology)

Mathematical modelling of infectious diseases

Droplet nucleus

Measles

Herd immunity

Respiratory droplet

COVID-19 pandemic on Diamond Princess

Maia Majumder

Spanish flu

COVID-19 pandemic in Vietnam

Kivu Ebola epidemic

Western African Ebola virus epidemic

Transmissibility

Airborne transmission

Fecal-oral route

Compartmental models in epidemiology

Saliva

Next-generation matrix

Hong Kong flu

Zero-COVID

Force of infection

History of plague

SARS

Infectious period

Latent period (epidemiology)

Endemic (epidemiology)

Betaarterivirus suid 1

Coxsackievirus

Enterovirus 71

Naught3

• The basic reproduction number (R 0 ), pronounced "R naught," is intended to be an indicator of the contagiousness or transmissibility of infectious and parasitic agents. (cdc.gov)
• One of these is called the 'basic reproduction number', otherwise known as the R naught, or R0. (abc.net.au)
• Although dynamic, the basic reproduction number (R 0 /R naught) is an epidemiologic entity that helps predict the expected number of cases from exposure to a single case, assuming all the individuals in the given population are susceptible. (medscape.com)

Person with COVID-191

• The average number of people that one person with COVID-19 is likely to infect in a population without any immunity (from previous infection) or any interventions. (cdc.gov)

Susceptible4

• Dietz states that R 0 is "the number of secondary cases one case would produce in a completely susceptible population" ( 19 ). (cdc.gov)
• The basic reproduction number of a contagious disease, known as R0, is the number of people per infected individual that will be generated throughout its infectious period in a susceptible population. (transportgeography.org)
• The rapid screening for antibody levels in the healthy population, such as health care workers, is important for quickly assessing the number of susceptible individuals when a measles outbreak occurs. (gla.ac.uk)
• The basic reproduction number R 0 is the average number of secondary infections due to an infective case during the infectious period when everyone else in the population is susceptible [ 4 ]. (biomedcentral.com)

Contagious1

• Measles is perhaps the most contagious infectious viral disease, with a basic reproduction number (R 0 ) estimated at between 12 and 18. (gla.ac.uk)

Infections3

• The R0 refers to the number of secondary infections generated from one infected individual, said Sanjaya Senanyake, an infectious diseases specialist from the Australian National University. (abc.net.au)
• Some communities see early, large waves of infected individuals, while others see smaller numbers of infections over a longer period of time, and others may not appear to have an epidemic at all. (sciencebuddies.org)
• He said the basic reproduction number of virus carriers, which measures the number of infections caused by an individual, has reached nearly 1.8 for the period between April 30 and June 11. (kusi.com)

Symptomatic3

• From the estimated numbers of symptomatic cases, we estimated that the critical proportions of the population that should be vaccinated were 15%, 4% and 10% respectively. (who.int)
• Running the model for the different values of R0, we quantified the number of symptomatic clinical cases, the clinical attack rates, the symptomatic clinical attack rates and the number of deaths. (who.int)
• Symptomatic Case Fatality Ratio: The number of symptomatic individuals who die of the disease among al individuals experiencing symptoms from the infection. (cdc.gov)

Reproductive3

• The basic reproduction number (R 0 ), also called the basic reproduction ratio or rate or the basic reproductive rate, is an epidemiologic metric used to describe the contagiousness or transmissibility of infectious agents. (cdc.gov)
• Further, we calculate the model's basic reproductive number and study its sensitivity to LLINs' coverage and its efficacy. (ebi.ac.uk)
• There is widespread consensus that improving the coverage and quality of Reproductive Maternal Newborn and Child Health (RMNCH) these interventions should be the focus of policies, associated programmes, innovations and it feeds to achieving aspects of Sustainable Development Goal number 3. (who.int)

Disease5

• Disease modeling uses the differential equation called the basic reproduction number, or R nought , ( R 0 = x ) to represent the average spread of an infection. (pitt.edu)
• Because of Operation Warpspeed and scientific advances we now have vaccines in an unprecedented short period of time, so that if we can continue to keep the contagion rate low enough we will eventually have enough people vaccinated that the number of disease cases (and deaths) will drop off dramatically. (explainxkcd.com)
• We parameterize the model by using the Markov Chain Monte Carlo (MCMC) method and estimate the control reproduction number ( R c ), as well as the effective daily reproduction ratio- R e ( t ), of the disease transmission in the mainland of China excluding Hubei province. (biomedcentral.com)
• The epidemiological scenarios focused mainly on evaluating the number of severe CoViD-19 cases and deaths due to this disease when isolation is introduced in a population. (harvard.edu)
• Effective reproduction numbers are commonly overestimated early in a disease outbreak. (who.int)

Epidemic3

• The higher the value of R0, the higher the risk of an epidemic or a pandemic since each individual can potentially infect a larger number of people with the risk of exponential growth. (transportgeography.org)
• Any number above 1 indicates a growing epidemic. (kusi.com)
• Nishiura H, Chowell G, Safan M, Castillo-Chavez C. Pros and cons of estimating the reproduction number from early epidemic growth rate of influenza A (H1N1) 2009. (who.int)

Deaths1

• This parameter is not necessarily equivalent to the number of reported deaths per reported cases, because many cases and deaths are never confirmed to be COVID-19, and there is a lag in time between when people are infected and when they die. (cdc.gov)

Estimates5

• Estimates of the incubation period, serial interval and reproduction number for COVID-19 were obtained and compared. (who.int)
• Although reproduction number estimates ranged from 0.3 to 14.8, in 33 studies (63%), they fell between 2 and 3. (who.int)
• The calculated incubation period was similar over the study period and in different settings, whereas estimates of the serial interval and effective reproduction number were setting-specific. (who.int)
• Estimates of the effective reproduction number varied with the setting and the underlying model assumptions. (who.int)
• Quantifying TB transmission: a systematic review of reproduction number and serial interval estimates for tuberculosis. (who.int)

Ratio1

• By calculating the effective reproduction ratio, we prove that the contact rate should be kept at least less than 30% of the normal level by April, 2020. (biomedcentral.com)

Infectious1

• Our novel approach helps clarify mechanisms of viral persistence and circulation in wild bats, including estimated ranges for key parameters such as the basic reproduction number and the duration of the infectious period. (datadryad.org)

Pandemic1

• The virus can be spread fairly easily, including by people who are infected but display no symptoms, and as a result, we are in the middle of a global pandemic, with nearly all countries in the world reporting an increasing number of infected individuals. (sciencebuddies.org)

Average2

• Fine supplements this definition with the description "average number of secondary cases" ( 17 ). (cdc.gov)
• But despite conducting more than 1.3 million tests, the highest number in Africa, it currently takes an average of 12 days to get results, which medical experts say is much too long to do any effective tracking and quarantining. (kusi.com)

Programme1

• by UNDP/UNFPA/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction. (who.int)

Measures1

• While the basic reproduction number with control measures is defined as the control reproduction number R c . (biomedcentral.com)

Results2

• Through some rigorous analyses, an explicit formula for the basic reproduction number of the model is calculated, and some results about stability and instability of equilibria for the model are established. (hindawi.com)
• From the numerical simulation results, we notice a basic reproduction number, [Formula: see text], confirming a substantial increase of incidence cases if no form of intervention takes place in the community. (ebi.ac.uk)

Control1

• Basic infection control for health care providers / Mike Kennamer. (who.int)

Describe1

• The topological complexity is a homotopy invariant that can be thought of as the minimum number of continuous instructions required to describe the movement of the robots between any initial configuration to any final one without collisions. (siam.org)

Model1

• It has been recently used as a preprocessing step for new model order reduction methods, so it is important to keep the number of new variables small. (siam.org)

Strategies1

• Strategies were presented for the prevention of disorders of reproduction, neurotoxic disorders, noise induced hearing loss, dermatological conditions, and psychological disorders brought on by exposures to hazardous working conditions. (cdc.gov)

Studies3

• Fifty-two studies estimated the reproduction number. (who.int)
• Current studies have shown that the number of mild and asymptomatic cases may be even greater. (bvsalud.org)
• Research needs concerning psychological disturbances center on basic studies and intervention studies to evaluate the effects of psychosocial job enhancement in terms of psychological well being. (cdc.gov)

Period1

• COVID-19 has stood out with a high impact on public health due to the high number of cases with infection in a short period of time. (bvsalud.org)

Case1

• Diekmann and colleagues use the description "expected number of secondary cases" and provide additional specificity to the terminology regarding a single case ( 13 ). (cdc.gov)

Time1

• Therefore, the choice of the anticoagulant and coagulant, rotation force and number of centrifugations, time elapsed between the sample activation and its clinical use, and the method of blood collection are some factors affecting PRP biological effect 6,7,20 . (bvsalud.org)

Sample1

• Sample dates, bat ID numbers, and NiVsG mean fluorescence index (MFI) values from Luminex assays applied to blood samples from captive Eidolon helvum. (datadryad.org)

Additional1

• From data collected in the São Paulo State, we estimated the transmission and additional mortality rates, from which we calculated the basic reproduction number R0. (harvard.edu)

Limit1

• There was a lot of talk of trying to get the basic reproduction number R0 as close to 1 as possible to limit that exponential growth curve we're all so familiar with now. (explainxkcd.com)

National1

• In Vietnam, ILRI partners with a number of institutions, such as the government ministries, universities, national research institutes, development agencies and the private sector, to plan and implement the research programs. (ilri.org)