|  | Australia | Brazil (1) | Brazil (2) | Cuba | Italy | Spain | UK | 
| Study name | Household
  Impacts of COVID-19 Survey | PNAD COVID19 | EPICOVID19 | National
  Prevalence Survey (seroprevalence) | Serum-prevalence
  of the SARS-COV2 virus infection | ENE-COVID19 –
  Estudio Nacional de Sero-Epidemiología de la Infección por SARS-CoV-2 en
  España | COVID-19
  Infection Survey | 
| Agency responsible | Australian Bureau of Statistics | IBGE | UFPEL – Universidade Federal de
  Pelotas | Ministerio de Salud Pública | Istat + Ministry of Health +
  Italian Red Cross | INE + Instituto de Salud Carlos
  III | Office for National Statistics | 
| Objective | To collect information on:
  concerns about personal health due to the spread of COVID-19; health
  precautions taken in response to COVID-19; job situation; and flu vaccination
  intentions. | To offer statistics on the
  evolution of the disease and its burden on the population, coupled with some
  statistics on labour force status | To estimate prevalence of the
  population by immunological status | Obtain precise estimates of the
  immunological status of the population, monitor the evolution of the
  epidemic, and identify the most significant risk factors for SARS-CoV-2
  infection. | To understand how many people
  have developed antibodies to Coronavirus, even in the absence of symptoms. | Obtain precise estimates of the
  immunological status of the population, monitor the evolution of the epidemic | To estimate prevalence of
  symptomatic and asymptomatic SARS-CoV-2 infection in the general population
  and how this varies over time | 
| Geographic coverage | National | National | 133 largest cities in Brazil | National | National | National | National | 
| Target population | Persons aged 18 years and over
  in private dwellings (excluding very remote areas) | Population living in private
  permanent households | 0 | Population living in private
  permanent households | Resident population in National
  Population Register | Non-institutionalised resident
  population | Non-institutionalised resident
  population | 
| Respondents | Persons aged 18 years and over | Resident eligible adults in
  households |  |  |  | Residents | Adults, adolescents and children
  aged 2 years or older | 
| Frequency | Every two weeks | Monthly | One week | First two weeks in May |  | Two weeks | Monthly | 
| Type of study | Sample survey | Household sample survey | Household sample survey, with
  one household member sampled for testing | Household sample survey with
  seroprevalence study | Probability sample of
  individuals from National Population Register + Non probabilistic
  serum-prevalence survey in some areas | Household sample survey | Household sample survey | 
| Collection mode(s) | Telephone | Telephone | Face-to-face | Face-to-face | Face-to-face in testing centers | Face-to-face in households | Face-to-face in households | 
| Evolution in time | Panel survey | Panel survey, initially
  commissioned for 4 months | Three waves, separated by three
  weeks | Expected to be repeated twice
  after first wave |  | Expected to be repeated at least
  three times, separated in time by one week | Repeated cross-sectional survey,
  for 12 months | 
| Sample size | 1,000 people | 193 thousand households per
  month | 33,250 households per wave | 1,300 households, 4,000
  residents | 150,000 individuals | 36,000 households, 90,000
  individuals. | 20,000 households, 27,500
  individuals per month | 
| Type of output | National estimates of
  proportions | Tables, anonymised microdata ,
  weekly estimates for country and five broad regions, monthly estimates for
  country and 27 states | Estimates of prevalence | Estimates of the immunological
  status of the population | Estimates for the size and
  extent of the infection in the population and describe its frequency in
  relation to certain factors such as gender, 6 age classes, 21 regions, 4
  economic activities. | Estimates of prevalence of
  antibodies to virus for 50 provinces and 2 autonomous cities | Estimates by age groups (2-4,
  5-11, 12-17, 18-24, 25-34, 35-44, 45-54, 55-64, 65-74, 75+ years) and
  geographical regions | 
| Website | https://www.abs.gov.au/ausstats/abs@.nsf/Lookup/4940.0main+features11-6%20Apr%202020 | www.ibge.gov.br | http://portal.ufpel.edu.br/ |  |  | https://portalcne.isciii.es/enecovid19/indexev.html | https://www.ons.gov.uk/peoplepopulationandcommunity/healthandsocialcare/conditionsanddiseases/datasets/coronaviruscovid19infectionsurveydata | 
| Contact |  | Maria Lucia Vieira
  (marialucia.vieira@ibge.gov.br) |  | Luis Carlos Silva | Monica Pratesi | José Manual Rodríguez Poo |  |