Delhi new sero-survey: One-fourth of samples to be taken from people in 50 and above age group 0 02.08.2020 14:53 The Financial Express Systematic Random Sampling methodology will be used for collection of samples with mandatory exclusion of individuals or households selected during the last sero survey conducted in June-July. Moscow.media Частные объявления сегодня Rss.plus Все новости за 24 часа Другие проекты от SMI24.net Музыкальные новости Агрегатор новостей 24СМИ
