原推：Air filters, also reducing transmission in indoor settings. Additionally, air quality monitors to identify where air quality improvements are needed:
https://t.co/kzsfVCFYd9
???Exciting Announcement: My team @Active_IAQ recently partnered with @VitalikButerin ‘s Balvi Fund to bring clean indoor air to atleast 1 million Indians. Balvi Fund intends to solve the problems exposed by the COVID pandemic – IAQ, global mRNA vax inequity … (1/n) twitter.com/Active_IAQ/sta…
https://twitter.com/VitalikButerin/status/1522017148977049600