Very nice Observation.
In case you were not aware, so far the government has taken everything into consideration.
The government has established 6 Corona Management Centers in those areas at risk.
In view of the above, three centers are located in Dar does namely ; Temeke, ilala and Kinondoni.
Two Centers In Kilimanjaro and One In Zanzibar. The government plans to increase number of Corona Management Centers in others areas across the borders.
Also. The Ministry of Health has instructed Medical Stores Department ( MSD) to ensure availability of N95 Face Mask

and all essential medicines necessary for Combating COVID-9.
The Question of as in why we are not advised to shake our hands, this was taken as a matter of Preventative Measures, it should not be taken literally. It does not prevent from contacting the Virus.
The Chinese Medical Professional are wearing all protective gears yet are infected.
You can be sure that Not shaking hands is just Bull Shit but always let’s take things positively.
Thanks!