"Medline; PMC; WHO" . "2020-05-06"^^ . . "Egbe, Catherine" . . "32395100" . "cc-by" . . . "PMC7206509" . "Ngobese, Senamile" . . "Tob Induc Dis" . . "32395100" . . . "10.18332/tid/120938" . "COVID-19 lockdown and the tobacco product ban in South Africa" .