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According to https://www.mining.com/sumitomo-halts-mines-in-bolivia-madagascar/ there was a curfew starting Thurs Mar 20 and 2 cities went into strict lockdown on the same date. Both hosts monitored in Madagascar are in the capital city of Antananarivo which has a population of 1.6 million or about 6.1% of the population of Madagascar. Within the two weeks before and after Mar 20 there does appear to be a reduction in the variability of the PingER IPDV measurements.
Malawi
PingER monitors three hosts in Malawi. They are the Parliament of Malawi (www.parliament.gov.mw), the Kamuza College of Nursing at the Queen Elizabeth Central Hospital, in Blantyre (www.kcn.unima.mw) and the University of Malawi - Malawi Polytechnic (www.poly.ac.mw) in Blantyre.
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According to https://en.wikipedia.org/wiki/COVID-19_pandemic_in_Rwanda the main intervention that would impact Internet traffic would appear to be on 21 March, officials announced a two-week lockdown. Both public and private employees are to work from home, under strict measures. There is a small dip in IPDV around this time, however, it is not evident this is due to the lockdown. Also, there is a larger dip two weeks lateAlso on 9 April, three new cases of coronavirus were identified, out of 720 samples examined in the previous 24 hours. This brought the total number of confirmed cases to 113 people (of which seven had recovered)
Sudan
PingER monitors five hosts in Sudan. They are: www.abs.sd the Agricultural Bank of Sudan in the capital Khartoum, www.bashaer.sd Bashaer for Energy Services in Khartoum, www.cert.sd Sudan CERT in Khartoum, www.iua.edu.sd the International University of Africa in Khartoum, and www.sustech.edu the Sudan University of Science and Technology in Khartoum.
According to https://en.wikipedia.org/wiki/COVID-19_pandemic_in_Sudan the first case was Mar 12. There is no indication of any interventions. According to https://reliefweb.int/report/sudan/sudan-covid-19-situation-update-15-may-2020 a three-weeks long lockdown imposed in Khartoum since mid-April was on 9 May extended for nearly two weeks as part of containment measures to prevent the spread of coronavirus. www.iua.edu.sd stopped responding on Apr 1.
Tanzania
PingER Monitors 4 hosts in Tanzania. Three are universities: the Open University of Tanzania (www.out.ac.tz) in Dar es Salaam, the former capital, that retains most government offices and is the country's largest city, principal port, and leading commercial centre; the Sokoine University of Agriculture (www.suanet.ac.tz) in Morogoro a town with a population of 315,866 (2012 census) in the eastern part of Tanzania, 122 mi) west of Dar es Salaam; the State University of Zanzibar (www.suza.ac.tz) in Zanzibar town. The other host is related to education: the Tanzania Commission for Science and Technology (www.costech.or.tz) in Dar es Salaam. Of these only www.suza.ac.tz appears to notice any substantial change in responsiveness. In particular, there are big dips at weekends. Also the peaks before Mar 21 are larger than those after.
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From https://en.wikipedia.org/wiki/COVID-19_pandemic_in_Zimbabwe we note the first case was mar Mar 21 and the first death was mar 23. There were the following interventions:
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